./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/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 0f8f22ce4f3bf9068fc0240f174785871ced813b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 01:41:47,679 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 01:41:47,680 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 01:41:47,686 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 01:41:47,686 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 01:41:47,686 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 01:41:47,687 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 01:41:47,688 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 01:41:47,689 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 01:41:47,689 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 01:41:47,690 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 01:41:47,690 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 01:41:47,691 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 01:41:47,691 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 01:41:47,692 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 01:41:47,693 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 01:41:47,693 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 01:41:47,694 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 01:41:47,696 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 01:41:47,697 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 01:41:47,697 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 01:41:47,698 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 01:41:47,700 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 01:41:47,700 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 01:41:47,700 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 01:41:47,701 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 01:41:47,701 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 01:41:47,702 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 01:41:47,702 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 01:41:47,703 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 01:41:47,703 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 01:41:47,704 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 01:41:47,704 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 01:41:47,704 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 01:41:47,705 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 01:41:47,705 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 01:41:47,705 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 01:41:47,713 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 01:41:47,713 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 01:41:47,714 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 01:41:47,714 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 01:41:47,714 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 01:41:47,714 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 01:41:47,714 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 01:41:47,715 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 01:41:47,715 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 01:41:47,715 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 01:41:47,715 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 01:41:47,715 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 01:41:47,715 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 01:41:47,715 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 01:41:47,716 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 01:41:47,716 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 01:41:47,716 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 01:41:47,716 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 01:41:47,716 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 01:41:47,716 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 01:41:47,716 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 01:41:47,717 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 01:41:47,717 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 01:41:47,717 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 01:41:47,717 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 01:41:47,717 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 01:41:47,717 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 01:41:47,718 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 01:41:47,718 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 01:41:47,718 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 01:41:47,718 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_0cf49b94-9844-43df-b624-5b9e02d5736a/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 -> 0f8f22ce4f3bf9068fc0240f174785871ced813b [2018-11-23 01:41:47,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 01:41:47,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 01:41:47,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 01:41:47,751 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 01:41:47,751 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 01:41:47,751 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-11-23 01:41:47,784 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/data/34193372e/9056db20dbb04f47828060838147bf17/FLAG44214ef9d [2018-11-23 01:41:48,178 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 01:41:48,178 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/sv-benchmarks/c/recursive/Fibonacci01_true-unreach-call_true-no-overflow.c [2018-11-23 01:41:48,182 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/data/34193372e/9056db20dbb04f47828060838147bf17/FLAG44214ef9d [2018-11-23 01:41:48,190 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/data/34193372e/9056db20dbb04f47828060838147bf17 [2018-11-23 01:41:48,193 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 01:41:48,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 01:41:48,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 01:41:48,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 01:41:48,197 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 01:41:48,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175cd69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48, skipping insertion in model container [2018-11-23 01:41:48,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 01:41:48,220 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 01:41:48,317 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 01:41:48,319 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 01:41:48,329 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 01:41:48,338 INFO L195 MainTranslator]: Completed translation [2018-11-23 01:41:48,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48 WrapperNode [2018-11-23 01:41:48,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 01:41:48,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 01:41:48,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 01:41:48,339 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 01:41:48,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 01:41:48,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 01:41:48,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 01:41:48,352 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 01:41:48,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... [2018-11-23 01:41:48,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 01:41:48,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 01:41:48,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 01:41:48,363 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 01:41:48,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/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 [2018-11-23 01:41:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-23 01:41:48,442 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-23 01:41:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 01:41:48,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 01:41:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 01:41:48,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 01:41:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 01:41:48,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 01:41:48,576 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 01:41:48,576 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 01:41:48,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:41:48 BoogieIcfgContainer [2018-11-23 01:41:48,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 01:41:48,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 01:41:48,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 01:41:48,580 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 01:41:48,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:41:48" (1/3) ... [2018-11-23 01:41:48,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1161f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:41:48, skipping insertion in model container [2018-11-23 01:41:48,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:41:48" (2/3) ... [2018-11-23 01:41:48,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1161f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:41:48, skipping insertion in model container [2018-11-23 01:41:48,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:41:48" (3/3) ... [2018-11-23 01:41:48,584 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci01_true-unreach-call_true-no-overflow.c [2018-11-23 01:41:48,591 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 01:41:48,596 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 01:41:48,610 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 01:41:48,635 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 01:41:48,636 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 01:41:48,636 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 01:41:48,636 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 01:41:48,636 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 01:41:48,636 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 01:41:48,636 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 01:41:48,636 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 01:41:48,637 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 01:41:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-23 01:41:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 01:41:48,656 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:41:48,657 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:41:48,659 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:41:48,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:41:48,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-11-23 01:41:48,665 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:41:48,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:41:48,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:48,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:41:48,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 01:41:48,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 01:41:48,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 01:41:48,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 01:41:48,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 01:41:48,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 01:41:48,843 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2018-11-23 01:41:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:41:48,957 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-23 01:41:48,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 01:41:48,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-23 01:41:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:41:48,967 INFO L225 Difference]: With dead ends: 36 [2018-11-23 01:41:48,967 INFO L226 Difference]: Without dead ends: 22 [2018-11-23 01:41:48,969 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-23 01:41:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-23 01:41:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-23 01:41:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-23 01:41:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-23 01:41:48,995 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-11-23 01:41:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:41:48,995 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-23 01:41:48,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 01:41:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-23 01:41:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 01:41:48,997 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:41:48,997 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:41:48,997 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:41:48,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:41:48,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-11-23 01:41:48,998 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:41:48,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:41:48,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:48,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:41:48,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 01:41:49,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:41:49,067 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/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 [2018-11-23 01:41:49,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:41:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:49,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:41:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-23 01:41:49,156 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-23 01:41:49,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-23 01:41:49,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 01:41:49,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 01:41:49,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 01:41:49,157 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2018-11-23 01:41:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:41:49,209 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-11-23 01:41:49,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 01:41:49,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-23 01:41:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:41:49,210 INFO L225 Difference]: With dead ends: 39 [2018-11-23 01:41:49,210 INFO L226 Difference]: Without dead ends: 24 [2018-11-23 01:41:49,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-23 01:41:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-23 01:41:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-23 01:41:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-23 01:41:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-11-23 01:41:49,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-11-23 01:41:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:41:49,217 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-11-23 01:41:49,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 01:41:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-11-23 01:41:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-23 01:41:49,218 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:41:49,218 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:41:49,218 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:41:49,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:41:49,219 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-11-23 01:41:49,219 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:41:49,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:41:49,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:49,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:41:49,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 01:41:49,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:41:49,300 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:41:49,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:41:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:49,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:41:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 01:41:49,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:41:49,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-11-23 01:41:49,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 01:41:49,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 01:41:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-11-23 01:41:49,436 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 16 states. [2018-11-23 01:41:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:41:49,559 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2018-11-23 01:41:49,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 01:41:49,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2018-11-23 01:41:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:41:49,562 INFO L225 Difference]: With dead ends: 34 [2018-11-23 01:41:49,562 INFO L226 Difference]: Without dead ends: 30 [2018-11-23 01:41:49,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2018-11-23 01:41:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-23 01:41:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-11-23 01:41:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-23 01:41:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-11-23 01:41:49,569 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-11-23 01:41:49,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:41:49,570 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-11-23 01:41:49,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 01:41:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-11-23 01:41:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-23 01:41:49,571 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:41:49,572 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:41:49,572 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:41:49,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:41:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-11-23 01:41:49,572 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:41:49,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:41:49,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:49,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:41:49,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-23 01:41:49,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:41:49,675 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:41:49,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 01:41:49,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 01:41:49,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:41:49,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:41:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-23 01:41:49,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:41:49,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-11-23 01:41:49,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 01:41:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 01:41:49,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-23 01:41:49,752 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 11 states. [2018-11-23 01:41:49,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:41:49,847 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2018-11-23 01:41:49,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 01:41:49,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-23 01:41:49,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:41:49,848 INFO L225 Difference]: With dead ends: 54 [2018-11-23 01:41:49,848 INFO L226 Difference]: Without dead ends: 32 [2018-11-23 01:41:49,849 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-11-23 01:41:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-23 01:41:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-11-23 01:41:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-23 01:41:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2018-11-23 01:41:49,853 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 41 [2018-11-23 01:41:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:41:49,853 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2018-11-23 01:41:49,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 01:41:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2018-11-23 01:41:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-23 01:41:49,855 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:41:49,855 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:41:49,855 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:41:49,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:41:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2018-11-23 01:41:49,856 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:41:49,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:41:49,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:49,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:41:49,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-23 01:41:49,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:41:49,975 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/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 [2018-11-23 01:41:49,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:41:49,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 01:41:49,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:41:49,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:41:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-23 01:41:50,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:41:50,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-11-23 01:41:50,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-23 01:41:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-23 01:41:50,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2018-11-23 01:41:50,092 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 20 states. [2018-11-23 01:41:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:41:50,266 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2018-11-23 01:41:50,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 01:41:50,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2018-11-23 01:41:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:41:50,268 INFO L225 Difference]: With dead ends: 42 [2018-11-23 01:41:50,268 INFO L226 Difference]: Without dead ends: 38 [2018-11-23 01:41:50,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2018-11-23 01:41:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-23 01:41:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2018-11-23 01:41:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-23 01:41:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2018-11-23 01:41:50,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 42 [2018-11-23 01:41:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:41:50,276 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2018-11-23 01:41:50,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-23 01:41:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2018-11-23 01:41:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-23 01:41:50,277 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:41:50,277 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:41:50,278 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:41:50,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:41:50,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1616597053, now seen corresponding path program 4 times [2018-11-23 01:41:50,278 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:41:50,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:41:50,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:50,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:41:50,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-23 01:41:50,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:41:50,328 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/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 [2018-11-23 01:41:50,334 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 01:41:50,346 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 01:41:50,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:41:50,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:41:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-11-23 01:41:50,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:41:50,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-23 01:41:50,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 01:41:50,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 01:41:50,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-23 01:41:50,371 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 7 states. [2018-11-23 01:41:50,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:41:50,435 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2018-11-23 01:41:50,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 01:41:50,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2018-11-23 01:41:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:41:50,437 INFO L225 Difference]: With dead ends: 60 [2018-11-23 01:41:50,437 INFO L226 Difference]: Without dead ends: 34 [2018-11-23 01:41:50,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-23 01:41:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-23 01:41:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2018-11-23 01:41:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-23 01:41:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-11-23 01:41:50,442 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 56 [2018-11-23 01:41:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:41:50,443 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2018-11-23 01:41:50,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 01:41:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2018-11-23 01:41:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-23 01:41:50,444 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:41:50,444 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:41:50,445 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:41:50,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:41:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1554048393, now seen corresponding path program 5 times [2018-11-23 01:41:50,445 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:41:50,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:41:50,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:50,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:41:50,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-23 01:41:50,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:41:50,541 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/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 [2018-11-23 01:41:50,547 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 01:41:50,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-23 01:41:50,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:41:50,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:41:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-23 01:41:50,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:41:50,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2018-11-23 01:41:50,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-23 01:41:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-23 01:41:50,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-11-23 01:41:50,602 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 12 states. [2018-11-23 01:41:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:41:50,699 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2018-11-23 01:41:50,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 01:41:50,699 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-23 01:41:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:41:50,700 INFO L225 Difference]: With dead ends: 63 [2018-11-23 01:41:50,700 INFO L226 Difference]: Without dead ends: 39 [2018-11-23 01:41:50,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2018-11-23 01:41:50,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-23 01:41:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-23 01:41:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 01:41:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-11-23 01:41:50,705 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 55 [2018-11-23 01:41:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:41:50,705 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-11-23 01:41:50,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-23 01:41:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-11-23 01:41:50,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-23 01:41:50,706 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:41:50,707 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:41:50,707 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:41:50,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:41:50,707 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 6 times [2018-11-23 01:41:50,707 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:41:50,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:41:50,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:50,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:41:50,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-23 01:41:50,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:41:50,808 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/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 [2018-11-23 01:41:50,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 01:41:50,832 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-11-23 01:41:50,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:41:50,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:41:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 146 proven. 67 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2018-11-23 01:41:51,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:41:51,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 25 [2018-11-23 01:41:51,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-23 01:41:51,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-23 01:41:51,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2018-11-23 01:41:51,059 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 25 states. [2018-11-23 01:41:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:41:51,376 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2018-11-23 01:41:51,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 01:41:51,377 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-11-23 01:41:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:41:51,377 INFO L225 Difference]: With dead ends: 74 [2018-11-23 01:41:51,378 INFO L226 Difference]: Without dead ends: 42 [2018-11-23 01:41:51,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-11-23 01:41:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-23 01:41:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-23 01:41:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-23 01:41:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2018-11-23 01:41:51,386 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 97 [2018-11-23 01:41:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:41:51,387 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2018-11-23 01:41:51,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-23 01:41:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2018-11-23 01:41:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-23 01:41:51,388 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:41:51,388 INFO L402 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, 1] [2018-11-23 01:41:51,388 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:41:51,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:41:51,388 INFO L82 PathProgramCache]: Analyzing trace with hash -865837754, now seen corresponding path program 7 times [2018-11-23 01:41:51,388 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:41:51,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:41:51,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:51,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:41:51,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:41:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 13 proven. 91 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-23 01:41:51,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:41:51,490 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/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 [2018-11-23 01:41:51,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:41:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:41:51,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:41:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 92 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-23 01:41:51,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:41:51,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 27 [2018-11-23 01:41:51,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-23 01:41:51,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-23 01:41:51,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2018-11-23 01:41:51,706 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 27 states. [2018-11-23 01:41:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:41:52,004 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2018-11-23 01:41:52,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-23 01:41:52,004 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2018-11-23 01:41:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:41:52,005 INFO L225 Difference]: With dead ends: 49 [2018-11-23 01:41:52,005 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 01:41:52,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=1409, Unknown=0, NotChecked=0, Total=1640 [2018-11-23 01:41:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 01:41:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 01:41:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 01:41:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 01:41:52,007 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2018-11-23 01:41:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:41:52,007 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 01:41:52,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-23 01:41:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 01:41:52,007 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 01:41:52,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 01:41:52,146 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-23 01:41:52,146 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-23 01:41:52,146 INFO L444 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|)) [2018-11-23 01:41:52,146 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-23 01:41:52,146 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 4 fibonacci_~n) .cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) .cse1) (and .cse0 (<= 1 |fibonacci_#t~ret0|) (<= fibonacci_~n 3) .cse1))) (< 1 |fibonacci_#in~n|)) [2018-11-23 01:41:52,146 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-23 01:41:52,146 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 01:41:52,147 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L451 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-11-23 01:41:52,147 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-11-23 01:41:52,147 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-11-23 01:41:52,148 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-11-23 01:41:52,148 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-11-23 01:41:52,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:41:52 BoogieIcfgContainer [2018-11-23 01:41:52,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 01:41:52,153 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 01:41:52,153 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 01:41:52,153 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 01:41:52,153 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:41:48" (3/4) ... [2018-11-23 01:41:52,156 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 01:41:52,162 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-23 01:41:52,162 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 01:41:52,163 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 01:41:52,166 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 01:41:52,166 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 01:41:52,166 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 01:41:52,200 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0cf49b94-9844-43df-b624-5b9e02d5736a/bin-2019/uautomizer/witness.graphml [2018-11-23 01:41:52,201 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 01:41:52,201 INFO L168 Benchmark]: Toolchain (without parser) took 4007.95 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 289.4 MB). Free memory was 962.3 MB in the beginning and 1.3 GB in the end (delta: -311.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:41:52,202 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:41:52,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 144.26 ms. Allocated memory is still 1.0 GB. Free memory was 962.3 MB in the beginning and 951.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 01:41:52,203 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.85 ms. Allocated memory is still 1.0 GB. Free memory was 951.6 MB in the beginning and 946.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-23 01:41:52,203 INFO L168 Benchmark]: Boogie Preprocessor took 10.82 ms. Allocated memory is still 1.0 GB. Free memory is still 946.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:41:52,203 INFO L168 Benchmark]: RCFGBuilder took 213.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -151.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-23 01:41:52,204 INFO L168 Benchmark]: TraceAbstraction took 3575.26 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 170.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -185.4 MB). Peak memory consumption was 408.4 MB. Max. memory is 11.5 GB. [2018-11-23 01:41:52,204 INFO L168 Benchmark]: Witness Printer took 47.75 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2018-11-23 01:41:52,206 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 982.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 144.26 ms. Allocated memory is still 1.0 GB. Free memory was 962.3 MB in the beginning and 951.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.85 ms. Allocated memory is still 1.0 GB. Free memory was 951.6 MB in the beginning and 946.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.82 ms. Allocated memory is still 1.0 GB. Free memory is still 946.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 213.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -151.4 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3575.26 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 170.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -185.4 MB). Peak memory consumption was 408.4 MB. Max. memory is 11.5 GB. * Witness Printer took 47.75 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 3.5s OverallTime, 9 OverallIterations, 13 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 160 SDtfs, 167 SDslu, 876 SDs, 0 SdLazy, 1371 SolverSat, 183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 577 GetRequests, 399 SyntacticMatches, 4 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 68 PreInvPairs, 86 NumberOfFragments, 50 HoareAnnotationTreeSize, 68 FomulaSimplifications, 53 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 321 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 844 NumberOfCodeBlocks, 795 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 827 ConstructedInterpolants, 0 QuantifiedInterpolants, 115915 SizeOfPredicates, 31 NumberOfNonLiveVariables, 829 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 1424/1910 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...