./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 7e40a98558d0111ea95f3ee60a44cc14c7768182 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 20:19:21,013 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:19:21,015 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:19:21,024 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:19:21,024 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:19:21,025 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:19:21,026 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:19:21,028 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:19:21,030 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:19:21,030 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:19:21,031 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:19:21,031 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:19:21,032 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:19:21,033 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:19:21,034 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:19:21,034 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:19:21,035 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:19:21,036 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:19:21,038 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:19:21,039 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:19:21,040 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:19:21,041 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:19:21,043 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:19:21,044 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:19:21,044 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:19:21,045 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:19:21,046 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:19:21,046 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:19:21,047 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:19:21,048 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:19:21,048 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:19:21,049 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:19:21,049 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:19:21,049 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:19:21,050 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:19:21,051 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:19:21,051 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 20:19:21,062 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:19:21,063 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:19:21,063 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:19:21,063 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 20:19:21,064 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 20:19:21,064 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 20:19:21,064 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 20:19:21,065 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:19:21,065 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 20:19:21,065 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:19:21,065 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 20:19:21,065 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:19:21,065 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:19:21,065 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:19:21,066 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:19:21,066 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 20:19:21,066 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:19:21,066 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:19:21,066 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:19:21,066 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:19:21,066 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:19:21,067 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:19:21,067 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:19:21,067 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:19:21,067 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:19:21,067 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:19:21,067 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 20:19:21,067 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:19:21,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:19:21,068 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_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-10-26 20:19:21,097 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:19:21,106 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:19:21,109 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:19:21,110 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:19:21,111 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:19:21,111 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-10-26 20:19:21,157 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/data/9d67b4490/7bc12ec4426a48ae8d31c913694d5eb3/FLAG58fd754a1 [2018-10-26 20:19:21,516 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:19:21,517 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-10-26 20:19:21,521 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/data/9d67b4490/7bc12ec4426a48ae8d31c913694d5eb3/FLAG58fd754a1 [2018-10-26 20:19:21,534 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/data/9d67b4490/7bc12ec4426a48ae8d31c913694d5eb3 [2018-10-26 20:19:21,537 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:19:21,538 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 20:19:21,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:19:21,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:19:21,542 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:19:21,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:19:21" (1/1) ... [2018-10-26 20:19:21,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67ed68ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21, skipping insertion in model container [2018-10-26 20:19:21,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:19:21" (1/1) ... [2018-10-26 20:19:21,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:19:21,567 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:19:21,675 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:19:21,677 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:19:21,688 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:19:21,700 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:19:21,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21 WrapperNode [2018-10-26 20:19:21,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:19:21,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:19:21,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:19:21,702 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:19:21,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21" (1/1) ... [2018-10-26 20:19:21,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21" (1/1) ... [2018-10-26 20:19:21,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21" (1/1) ... [2018-10-26 20:19:21,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21" (1/1) ... [2018-10-26 20:19:21,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21" (1/1) ... [2018-10-26 20:19:21,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21" (1/1) ... [2018-10-26 20:19:21,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21" (1/1) ... [2018-10-26 20:19:21,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:19:21,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:19:21,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:19:21,727 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:19:21,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 [2018-10-26 20:19:21,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:19:21,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:19:21,783 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-10-26 20:19:21,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:19:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 20:19:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-10-26 20:19:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-10-26 20:19:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:19:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:19:21,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:19:22,121 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:19:22,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:19:22 BoogieIcfgContainer [2018-10-26 20:19:22,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:19:22,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:19:22,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:19:22,137 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:19:22,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:19:21" (1/3) ... [2018-10-26 20:19:22,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcae70e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:19:22, skipping insertion in model container [2018-10-26 20:19:22,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:19:21" (2/3) ... [2018-10-26 20:19:22,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcae70e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:19:22, skipping insertion in model container [2018-10-26 20:19:22,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:19:22" (3/3) ... [2018-10-26 20:19:22,140 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-10-26 20:19:22,159 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:19:22,179 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:19:22,202 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:19:22,243 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 20:19:22,244 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:19:22,244 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:19:22,244 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:19:22,244 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:19:22,245 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:19:22,245 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:19:22,245 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:19:22,245 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:19:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-10-26 20:19:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-26 20:19:22,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:22,277 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:22,279 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:22,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:22,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2018-10-26 20:19:22,287 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:22,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:22,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:22,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:22,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:19:22,482 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:19:22,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 20:19:22,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 20:19:22,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 20:19:22,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 20:19:22,499 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-10-26 20:19:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:22,653 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-10-26 20:19:22,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 20:19:22,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-26 20:19:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:22,663 INFO L225 Difference]: With dead ends: 33 [2018-10-26 20:19:22,664 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 20:19:22,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 20:19:22,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 20:19:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-26 20:19:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 20:19:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-10-26 20:19:22,701 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-10-26 20:19:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:22,701 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-10-26 20:19:22,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 20:19:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-10-26 20:19:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 20:19:22,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:22,703 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:22,703 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:22,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:22,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2018-10-26 20:19:22,704 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:22,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:22,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:22,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:22,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:19:22,755 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:19:22,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 20:19:22,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 20:19:22,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 20:19:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 20:19:22,757 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-10-26 20:19:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:23,013 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-10-26 20:19:23,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 20:19:23,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-26 20:19:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:23,016 INFO L225 Difference]: With dead ends: 27 [2018-10-26 20:19:23,016 INFO L226 Difference]: Without dead ends: 23 [2018-10-26 20:19:23,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 20:19:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-26 20:19:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-10-26 20:19:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 20:19:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-10-26 20:19:23,024 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-10-26 20:19:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:23,027 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-10-26 20:19:23,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 20:19:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-10-26 20:19:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 20:19:23,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:23,028 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:23,031 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:23,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:23,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2018-10-26 20:19:23,032 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:23,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:23,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:23,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:23,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-26 20:19:23,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:23,183 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 [2018-10-26 20:19:23,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:23,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-10-26 20:19:23,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:23,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-10-26 20:19:23,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 20:19:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 20:19:23,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:19:23,296 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-10-26 20:19:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:23,583 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-10-26 20:19:23,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 20:19:23,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-26 20:19:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:23,585 INFO L225 Difference]: With dead ends: 38 [2018-10-26 20:19:23,585 INFO L226 Difference]: Without dead ends: 23 [2018-10-26 20:19:23,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-10-26 20:19:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-26 20:19:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-26 20:19:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-26 20:19:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-10-26 20:19:23,591 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-10-26 20:19:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:23,591 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-10-26 20:19:23,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 20:19:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-10-26 20:19:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 20:19:23,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:23,592 INFO L375 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] [2018-10-26 20:19:23,593 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:23,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2018-10-26 20:19:23,593 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:23,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:23,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:23,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:23,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 20:19:23,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:23,667 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 20:19:23,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:19:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:23,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-26 20:19:23,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:23,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 20:19:23,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 20:19:23,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 20:19:23,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-10-26 20:19:23,748 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-10-26 20:19:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:23,996 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-10-26 20:19:23,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 20:19:23,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-10-26 20:19:23,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:23,998 INFO L225 Difference]: With dead ends: 32 [2018-10-26 20:19:23,998 INFO L226 Difference]: Without dead ends: 28 [2018-10-26 20:19:23,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:19:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-26 20:19:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-26 20:19:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-26 20:19:24,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-10-26 20:19:24,006 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-10-26 20:19:24,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:24,007 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-10-26 20:19:24,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 20:19:24,007 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-10-26 20:19:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-26 20:19:24,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:24,008 INFO L375 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] [2018-10-26 20:19:24,009 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:24,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times [2018-10-26 20:19:24,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:24,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:24,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:24,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:24,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-26 20:19:24,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:24,120 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 20:19:24,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:19:24,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:19:24,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:24,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-26 20:19:24,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:24,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-10-26 20:19:24,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 20:19:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 20:19:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-26 20:19:24,239 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-10-26 20:19:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:24,352 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-10-26 20:19:24,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 20:19:24,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-10-26 20:19:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:24,354 INFO L225 Difference]: With dead ends: 40 [2018-10-26 20:19:24,354 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 20:19:24,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-10-26 20:19:24,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 20:19:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-10-26 20:19:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-26 20:19:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-10-26 20:19:24,364 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-10-26 20:19:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:24,365 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-10-26 20:19:24,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 20:19:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-10-26 20:19:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-26 20:19:24,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:24,367 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:24,367 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:24,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash -383842586, now seen corresponding path program 3 times [2018-10-26 20:19:24,368 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:24,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:24,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:24,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:24,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-10-26 20:19:24,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:24,475 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 [2018-10-26 20:19:24,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:19:24,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-26 20:19:24,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:24,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-10-26 20:19:24,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:24,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-26 20:19:24,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 20:19:24,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 20:19:24,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-26 20:19:24,624 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 7 states. [2018-10-26 20:19:24,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:24,764 INFO L93 Difference]: Finished difference Result 48 states and 81 transitions. [2018-10-26 20:19:24,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 20:19:24,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2018-10-26 20:19:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:24,766 INFO L225 Difference]: With dead ends: 48 [2018-10-26 20:19:24,766 INFO L226 Difference]: Without dead ends: 44 [2018-10-26 20:19:24,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-26 20:19:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-26 20:19:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2018-10-26 20:19:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-26 20:19:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 55 transitions. [2018-10-26 20:19:24,775 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 55 transitions. Word has length 68 [2018-10-26 20:19:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:24,776 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 55 transitions. [2018-10-26 20:19:24,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 20:19:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 55 transitions. [2018-10-26 20:19:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-26 20:19:24,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:24,778 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 8, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:24,778 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:24,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash 696026233, now seen corresponding path program 4 times [2018-10-26 20:19:24,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:24,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:24,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:24,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:24,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 110 proven. 8 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-10-26 20:19:24,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:24,950 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 [2018-10-26 20:19:24,969 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:19:25,013 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:19:25,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:25,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 22 proven. 123 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-10-26 20:19:25,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:25,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2018-10-26 20:19:25,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 20:19:25,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 20:19:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-10-26 20:19:25,116 INFO L87 Difference]: Start difference. First operand 36 states and 55 transitions. Second operand 14 states. [2018-10-26 20:19:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:25,634 INFO L93 Difference]: Finished difference Result 83 states and 148 transitions. [2018-10-26 20:19:25,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 20:19:25,634 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2018-10-26 20:19:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:25,636 INFO L225 Difference]: With dead ends: 83 [2018-10-26 20:19:25,637 INFO L226 Difference]: Without dead ends: 53 [2018-10-26 20:19:25,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2018-10-26 20:19:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-26 20:19:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2018-10-26 20:19:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-26 20:19:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2018-10-26 20:19:25,646 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 81 [2018-10-26 20:19:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:25,647 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2018-10-26 20:19:25,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 20:19:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2018-10-26 20:19:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-26 20:19:25,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:25,649 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:25,650 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:25,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:25,650 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 5 times [2018-10-26 20:19:25,650 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:25,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:25,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:25,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:25,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-10-26 20:19:25,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:25,899 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 [2018-10-26 20:19:25,905 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 20:19:25,952 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-26 20:19:25,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:25,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2018-10-26 20:19:26,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:26,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2018-10-26 20:19:26,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 20:19:26,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 20:19:26,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-26 20:19:26,030 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 9 states. [2018-10-26 20:19:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:26,121 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2018-10-26 20:19:26,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 20:19:26,121 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2018-10-26 20:19:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:26,122 INFO L225 Difference]: With dead ends: 60 [2018-10-26 20:19:26,122 INFO L226 Difference]: Without dead ends: 56 [2018-10-26 20:19:26,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-26 20:19:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-26 20:19:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-26 20:19:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-26 20:19:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2018-10-26 20:19:26,129 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 109 [2018-10-26 20:19:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:26,130 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2018-10-26 20:19:26,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 20:19:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2018-10-26 20:19:26,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-26 20:19:26,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:26,133 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:26,133 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:26,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1510121204, now seen corresponding path program 6 times [2018-10-26 20:19:26,133 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:26,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:26,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:26,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:26,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 403 proven. 124 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-10-26 20:19:26,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:26,307 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 [2018-10-26 20:19:26,314 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 20:19:26,534 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-26 20:19:26,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:26,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 433 proven. 94 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-10-26 20:19:26,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:26,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-26 20:19:26,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 20:19:26,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 20:19:26,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-26 20:19:26,610 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand 9 states. [2018-10-26 20:19:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:26,781 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2018-10-26 20:19:26,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 20:19:26,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 204 [2018-10-26 20:19:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:26,785 INFO L225 Difference]: With dead ends: 63 [2018-10-26 20:19:26,785 INFO L226 Difference]: Without dead ends: 59 [2018-10-26 20:19:26,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-26 20:19:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-26 20:19:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2018-10-26 20:19:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-26 20:19:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2018-10-26 20:19:26,792 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 204 [2018-10-26 20:19:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:26,793 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2018-10-26 20:19:26,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 20:19:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2018-10-26 20:19:26,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-26 20:19:26,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:26,798 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 29, 17, 17, 17, 17, 17, 17, 17, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:26,798 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:26,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:26,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1423706261, now seen corresponding path program 7 times [2018-10-26 20:19:26,798 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:26,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:26,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:26,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:26,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 363 proven. 403 refuted. 0 times theorem prover too weak. 2564 trivial. 0 not checked. [2018-10-26 20:19:26,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:26,987 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 [2018-10-26 20:19:26,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:27,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 125 proven. 835 refuted. 0 times theorem prover too weak. 2370 trivial. 0 not checked. [2018-10-26 20:19:27,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:27,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2018-10-26 20:19:27,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 20:19:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 20:19:27,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-10-26 20:19:27,302 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand 17 states. [2018-10-26 20:19:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:28,053 INFO L93 Difference]: Finished difference Result 132 states and 244 transitions. [2018-10-26 20:19:28,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 20:19:28,054 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 246 [2018-10-26 20:19:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:28,055 INFO L225 Difference]: With dead ends: 132 [2018-10-26 20:19:28,055 INFO L226 Difference]: Without dead ends: 82 [2018-10-26 20:19:28,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 20:19:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-26 20:19:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2018-10-26 20:19:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-26 20:19:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 106 transitions. [2018-10-26 20:19:28,067 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 106 transitions. Word has length 246 [2018-10-26 20:19:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:28,068 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 106 transitions. [2018-10-26 20:19:28,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 20:19:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 106 transitions. [2018-10-26 20:19:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-26 20:19:28,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:28,073 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:28,073 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:28,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:28,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1242507885, now seen corresponding path program 8 times [2018-10-26 20:19:28,074 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:28,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:28,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:28,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:28,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 248 proven. 1232 refuted. 0 times theorem prover too weak. 5640 trivial. 0 not checked. [2018-10-26 20:19:28,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:28,259 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 [2018-10-26 20:19:28,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:19:28,366 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:19:28,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:28,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:28,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 214 proven. 1491 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2018-10-26 20:19:28,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:28,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2018-10-26 20:19:28,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 20:19:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 20:19:28,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-26 20:19:28,682 INFO L87 Difference]: Start difference. First operand 78 states and 106 transitions. Second operand 11 states. [2018-10-26 20:19:28,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:28,842 INFO L93 Difference]: Finished difference Result 87 states and 124 transitions. [2018-10-26 20:19:28,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 20:19:28,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 354 [2018-10-26 20:19:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:28,845 INFO L225 Difference]: With dead ends: 87 [2018-10-26 20:19:28,845 INFO L226 Difference]: Without dead ends: 83 [2018-10-26 20:19:28,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-10-26 20:19:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-26 20:19:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-26 20:19:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-26 20:19:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2018-10-26 20:19:28,855 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 354 [2018-10-26 20:19:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:28,856 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2018-10-26 20:19:28,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 20:19:28,856 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2018-10-26 20:19:28,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-10-26 20:19:28,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:28,859 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:28,859 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:28,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:28,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1942503438, now seen corresponding path program 9 times [2018-10-26 20:19:28,860 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:28,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:28,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:28,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:28,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1717 proven. 615 refuted. 0 times theorem prover too weak. 14075 trivial. 0 not checked. [2018-10-26 20:19:29,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:29,252 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/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 [2018-10-26 20:19:29,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 20:19:29,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-26 20:19:29,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:29,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 1662 proven. 279 refuted. 0 times theorem prover too weak. 14466 trivial. 0 not checked. [2018-10-26 20:19:29,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:29,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-26 20:19:29,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 20:19:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 20:19:29,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-10-26 20:19:29,522 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand 11 states. [2018-10-26 20:19:29,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:29,650 INFO L93 Difference]: Finished difference Result 90 states and 129 transitions. [2018-10-26 20:19:29,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 20:19:29,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 531 [2018-10-26 20:19:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:29,653 INFO L225 Difference]: With dead ends: 90 [2018-10-26 20:19:29,653 INFO L226 Difference]: Without dead ends: 86 [2018-10-26 20:19:29,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-10-26 20:19:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-26 20:19:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2018-10-26 20:19:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-26 20:19:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 119 transitions. [2018-10-26 20:19:29,663 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 119 transitions. Word has length 531 [2018-10-26 20:19:29,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:29,664 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 119 transitions. [2018-10-26 20:19:29,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 20:19:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 119 transitions. [2018-10-26 20:19:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2018-10-26 20:19:29,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:29,670 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:29,670 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:29,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1052494023, now seen corresponding path program 10 times [2018-10-26 20:19:29,670 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:29,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:29,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:29,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:29,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 440 proven. 2503 refuted. 0 times theorem prover too weak. 16160 trivial. 0 not checked. [2018-10-26 20:19:30,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:30,069 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:19:30,075 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 20:19:30,181 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 20:19:30,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:30,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 19103 backedges. 401 proven. 2942 refuted. 0 times theorem prover too weak. 15760 trivial. 0 not checked. [2018-10-26 20:19:30,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:30,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-10-26 20:19:30,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 20:19:30,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 20:19:30,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-26 20:19:30,420 INFO L87 Difference]: Start difference. First operand 83 states and 119 transitions. Second operand 12 states. [2018-10-26 20:19:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:30,685 INFO L93 Difference]: Finished difference Result 95 states and 146 transitions. [2018-10-26 20:19:30,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 20:19:30,685 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 572 [2018-10-26 20:19:30,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:30,687 INFO L225 Difference]: With dead ends: 95 [2018-10-26 20:19:30,687 INFO L226 Difference]: Without dead ends: 91 [2018-10-26 20:19:30,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-10-26 20:19:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-26 20:19:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2018-10-26 20:19:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-26 20:19:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2018-10-26 20:19:30,698 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 572 [2018-10-26 20:19:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:30,699 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2018-10-26 20:19:30,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 20:19:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2018-10-26 20:19:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 982 [2018-10-26 20:19:30,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:30,706 INFO L375 BasicCegarLoop]: trace histogram [143, 143, 116, 71, 71, 71, 71, 71, 71, 71, 45, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:30,707 INFO L424 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:30,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:30,707 INFO L82 PathProgramCache]: Analyzing trace with hash -974415133, now seen corresponding path program 11 times [2018-10-26 20:19:30,707 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:30,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:30,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:30,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:30,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:31,606 WARN L179 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-10-26 20:19:31,894 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-10-26 20:19:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 57222 backedges. 3883 proven. 2398 refuted. 0 times theorem prover too weak. 50941 trivial. 0 not checked. [2018-10-26 20:19:32,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:32,208 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:19:32,224 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 20:19:32,630 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-26 20:19:32,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:32,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 57222 backedges. 26881 proven. 358 refuted. 0 times theorem prover too weak. 29983 trivial. 0 not checked. [2018-10-26 20:19:33,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:33,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2018-10-26 20:19:33,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 20:19:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 20:19:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2018-10-26 20:19:33,198 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 21 states. [2018-10-26 20:19:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:34,366 INFO L93 Difference]: Finished difference Result 218 states and 489 transitions. [2018-10-26 20:19:34,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 20:19:34,367 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 981 [2018-10-26 20:19:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:34,368 INFO L225 Difference]: With dead ends: 218 [2018-10-26 20:19:34,369 INFO L226 Difference]: Without dead ends: 116 [2018-10-26 20:19:34,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 20:19:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-26 20:19:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2018-10-26 20:19:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-26 20:19:34,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2018-10-26 20:19:34,377 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 981 [2018-10-26 20:19:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:34,387 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2018-10-26 20:19:34,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 20:19:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2018-10-26 20:19:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2018-10-26 20:19:34,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:34,393 INFO L375 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] [2018-10-26 20:19:34,394 INFO L424 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:34,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash -969888603, now seen corresponding path program 12 times [2018-10-26 20:19:34,394 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:34,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:34,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:34,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:34,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1631 proven. 5642 refuted. 0 times theorem prover too weak. 32215 trivial. 0 not checked. [2018-10-26 20:19:34,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:34,978 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:19:34,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 20:19:35,073 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2018-10-26 20:19:35,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:35,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 39488 backedges. 1628 proven. 3526 refuted. 0 times theorem prover too weak. 34334 trivial. 0 not checked. [2018-10-26 20:19:36,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:36,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 23 [2018-10-26 20:19:36,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 20:19:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 20:19:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-10-26 20:19:36,605 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand 23 states. [2018-10-26 20:19:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:37,518 INFO L93 Difference]: Finished difference Result 257 states and 374 transitions. [2018-10-26 20:19:37,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-26 20:19:37,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 817 [2018-10-26 20:19:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:37,521 INFO L225 Difference]: With dead ends: 257 [2018-10-26 20:19:37,521 INFO L226 Difference]: Without dead ends: 141 [2018-10-26 20:19:37,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 819 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=523, Invalid=1927, Unknown=0, NotChecked=0, Total=2450 [2018-10-26 20:19:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-26 20:19:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2018-10-26 20:19:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-26 20:19:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 161 transitions. [2018-10-26 20:19:37,546 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 161 transitions. Word has length 817 [2018-10-26 20:19:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:37,547 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 161 transitions. [2018-10-26 20:19:37,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 20:19:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 161 transitions. [2018-10-26 20:19:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2018-10-26 20:19:37,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:37,561 INFO L375 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] [2018-10-26 20:19:37,562 INFO L424 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:37,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:37,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 13 times [2018-10-26 20:19:37,562 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:37,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:37,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:37,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 20:19:37,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-10-26 20:19:39,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:39,123 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:19:39,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:39,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-10-26 20:19:40,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:40,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-10-26 20:19:40,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 20:19:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 20:19:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 20:19:40,361 INFO L87 Difference]: Start difference. First operand 133 states and 161 transitions. Second operand 36 states. [2018-10-26 20:19:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:41,222 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2018-10-26 20:19:41,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 20:19:41,223 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2018-10-26 20:19:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:41,225 INFO L225 Difference]: With dead ends: 145 [2018-10-26 20:19:41,225 INFO L226 Difference]: Without dead ends: 133 [2018-10-26 20:19:41,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 880 SyntacticMatches, 55 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 20:19:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-26 20:19:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2018-10-26 20:19:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-26 20:19:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2018-10-26 20:19:41,244 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 749 [2018-10-26 20:19:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:41,247 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2018-10-26 20:19:41,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 20:19:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2018-10-26 20:19:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2018-10-26 20:19:41,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:19:41,254 INFO L375 BasicCegarLoop]: trace histogram [125, 125, 101, 62, 62, 62, 62, 62, 62, 62, 39, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:19:41,254 INFO L424 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:19:41,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:19:41,255 INFO L82 PathProgramCache]: Analyzing trace with hash 11110270, now seen corresponding path program 14 times [2018-10-26 20:19:41,255 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 20:19:41,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 20:19:41,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:41,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:19:41,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:19:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:19:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 2322 proven. 3119 refuted. 0 times theorem prover too weak. 38173 trivial. 0 not checked. [2018-10-26 20:19:42,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:19:42,107 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:19:42,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 20:19:42,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 20:19:42,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 20:19:42,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:19:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 43614 backedges. 2332 proven. 3102 refuted. 0 times theorem prover too weak. 38180 trivial. 0 not checked. [2018-10-26 20:19:42,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 20:19:42,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2018-10-26 20:19:42,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 20:19:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 20:19:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-10-26 20:19:42,675 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand 16 states. [2018-10-26 20:19:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:19:43,116 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2018-10-26 20:19:43,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 20:19:43,117 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 858 [2018-10-26 20:19:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:19:43,119 INFO L225 Difference]: With dead ends: 117 [2018-10-26 20:19:43,119 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 20:19:43,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 863 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2018-10-26 20:19:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 20:19:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 20:19:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 20:19:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 20:19:43,120 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 858 [2018-10-26 20:19:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:19:43,121 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 20:19:43,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 20:19:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 20:19:43,121 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 20:19:43,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 20:19:43,322 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 20:19:43,324 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 20:19:44,942 WARN L179 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 111 DAG size of output: 8 [2018-10-26 20:19:45,437 WARN L179 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 1 [2018-10-26 20:19:47,089 WARN L179 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 149 DAG size of output: 61 [2018-10-26 20:19:47,091 INFO L425 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-10-26 20:19:47,092 INFO L428 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-10-26 20:19:47,092 INFO L421 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-10-26 20:19:47,092 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-10-26 20:19:47,092 INFO L421 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (or (and (<= 7 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 8) (<= 8 |fibonacci_#t~ret0|)) (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6) (<= |fibonacci_#t~ret0| 5)) (< |fibonacci_#in~n| 6) (<= 8 |fibonacci_#in~n|)) (<= |fibonacci_#in~n| fibonacci_~n) (or (<= 5 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 3) (and (<= |fibonacci_#t~ret0| 2) (<= 2 |fibonacci_#t~ret0|))) (or (< 3 |fibonacci_#in~n|) (and (<= |fibonacci_#t~ret0| 1) (<= 1 |fibonacci_#t~ret0|))) (or (< |fibonacci_#in~n| 5) (and (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 3)) (< 5 |fibonacci_#in~n|)) (or (<= |fibonacci_#in~n| 8) (<= 10 |fibonacci_#in~n|) (and (<= |fibonacci_#t~ret0| 21) (<= 21 |fibonacci_#t~ret0|))) (<= 2 fibonacci_~n) (or (and (<= 13 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 13)) (<= |fibonacci_#in~n| 7) (<= 9 |fibonacci_#in~n|)) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-10-26 20:19:47,092 INFO L425 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-10-26 20:19:47,092 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-10-26 20:19:47,092 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-10-26 20:19:47,092 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-10-26 20:19:47,093 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 20:19:47,093 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 20:19:47,093 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 20:19:47,093 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 20:19:47,093 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 20:19:47,093 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 20:19:47,093 INFO L425 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-10-26 20:19:47,093 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-10-26 20:19:47,093 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-10-26 20:19:47,093 INFO L425 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-10-26 20:19:47,093 INFO L421 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= 9 main_~x~0) (<= main_~x~0 9)) [2018-10-26 20:19:47,094 INFO L425 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-10-26 20:19:47,094 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-10-26 20:19:47,094 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed. [2018-10-26 20:19:47,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:19:47 BoogieIcfgContainer [2018-10-26 20:19:47,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:19:47,097 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:19:47,097 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:19:47,097 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:19:47,098 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:19:22" (3/4) ... [2018-10-26 20:19:47,102 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 20:19:47,109 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-10-26 20:19:47,110 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 20:19:47,110 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 20:19:47,114 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-10-26 20:19:47,115 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-26 20:19:47,115 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 20:19:47,167 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d8543d00-130b-4490-a9c7-cd0a46ad9a11/bin-2019/uautomizer/witness.graphml [2018-10-26 20:19:47,167 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:19:47,168 INFO L168 Benchmark]: Toolchain (without parser) took 25630.60 ms. Allocated memory was 1.0 GB in the beginning and 2.1 GB in the end (delta: 1.1 GB). Free memory was 960.3 MB in the beginning and 1.5 GB in the end (delta: -579.8 MB). Peak memory consumption was 470.4 MB. Max. memory is 11.5 GB. [2018-10-26 20:19:47,170 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:19:47,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.60 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 948.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-10-26 20:19:47,171 INFO L168 Benchmark]: Boogie Preprocessor took 24.89 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:19:47,171 INFO L168 Benchmark]: RCFGBuilder took 395.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.1 MB). Free memory was 948.5 MB in the beginning and 1.2 GB in the end (delta: -225.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. [2018-10-26 20:19:47,171 INFO L168 Benchmark]: TraceAbstraction took 24974.45 ms. Allocated memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: 864.0 MB). Free memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: -366.4 MB). Peak memory consumption was 497.6 MB. Max. memory is 11.5 GB. [2018-10-26 20:19:47,172 INFO L168 Benchmark]: Witness Printer took 70.24 ms. Allocated memory is still 2.1 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:19:47,179 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 161.60 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 948.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.89 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 395.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.1 MB). Free memory was 948.5 MB in the beginning and 1.2 GB in the end (delta: -225.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 24974.45 ms. Allocated memory was 1.2 GB in the beginning and 2.1 GB in the end (delta: 864.0 MB). Free memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: -366.4 MB). Peak memory consumption was 497.6 MB. Max. memory is 11.5 GB. * Witness Printer took 70.24 ms. Allocated memory is still 2.1 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: 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, 23 locations, 1 error locations. SAFE Result, 24.8s OverallTime, 17 OverallIterations, 143 TraceHistogramMax, 6.7s AutomataDifference, 0.0s DeadEndRemovalTime, 3.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 401 SDtfs, 674 SDslu, 2407 SDs, 0 SdLazy, 3172 SolverSat, 781 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6199 GetRequests, 5827 SyntacticMatches, 58 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=15, 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: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 67 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 227 PreInvPairs, 494 NumberOfFragments, 132 HoareAnnotationTreeSize, 227 FomulaSimplifications, 3510 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4358 FormulaSimplificationTreeSizeReductionInter, 3.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 11353 NumberOfCodeBlocks, 9539 NumberOfCodeBlocksAsserted, 149 NumberOfCheckSat, 11321 ConstructedInterpolants, 0 QuantifiedInterpolants, 12539521 SizeOfPredicates, 88 NumberOfNonLiveVariables, 8482 ConjunctsInSsa, 615 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 394500/445480 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...