./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/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 595c6555624af5bbcf79585a20acb2500e3eeee8 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 01:59:14,639 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 01:59:14,640 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 01:59:14,646 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 01:59:14,646 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 01:59:14,647 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 01:59:14,647 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 01:59:14,648 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 01:59:14,649 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 01:59:14,649 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 01:59:14,650 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 01:59:14,650 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 01:59:14,650 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 01:59:14,651 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 01:59:14,651 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 01:59:14,651 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 01:59:14,652 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 01:59:14,653 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 01:59:14,654 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 01:59:14,654 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 01:59:14,655 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 01:59:14,655 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 01:59:14,656 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 01:59:14,657 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 01:59:14,657 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 01:59:14,657 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 01:59:14,658 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 01:59:14,658 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 01:59:14,658 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 01:59:14,659 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 01:59:14,659 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 01:59:14,659 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 01:59:14,659 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 01:59:14,660 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 01:59:14,660 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 01:59:14,660 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 01:59:14,661 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-02 01:59:14,668 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 01:59:14,668 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 01:59:14,668 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 01:59:14,668 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 01:59:14,669 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 01:59:14,669 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 01:59:14,669 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 01:59:14,669 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 01:59:14,669 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 01:59:14,669 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 01:59:14,669 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 01:59:14,669 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 01:59:14,669 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 01:59:14,669 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 01:59:14,670 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 01:59:14,670 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 01:59:14,670 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 01:59:14,670 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 01:59:14,670 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 01:59:14,670 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 01:59:14,670 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 01:59:14,670 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 01:59:14,670 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 01:59:14,670 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 01:59:14,671 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 01:59:14,671 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 01:59:14,671 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 01:59:14,671 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 01:59:14,671 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 01:59:14,671 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 01:59:14,671 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_b2b31a05-3314-4f01-aad7-43c626384136/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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-12-02 01:59:14,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 01:59:14,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 01:59:14,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 01:59:14,700 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 01:59:14,700 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 01:59:14,700 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-12-02 01:59:14,736 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/data/6c4cbf684/95fcc5395edd46f6a05c2316efec0d42/FLAG604a21525 [2018-12-02 01:59:15,124 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 01:59:15,124 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-12-02 01:59:15,128 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/data/6c4cbf684/95fcc5395edd46f6a05c2316efec0d42/FLAG604a21525 [2018-12-02 01:59:15,137 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/data/6c4cbf684/95fcc5395edd46f6a05c2316efec0d42 [2018-12-02 01:59:15,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 01:59:15,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 01:59:15,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 01:59:15,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 01:59:15,144 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 01:59:15,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59facd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15, skipping insertion in model container [2018-12-02 01:59:15,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 01:59:15,165 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 01:59:15,250 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:59:15,253 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 01:59:15,262 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:59:15,270 INFO L195 MainTranslator]: Completed translation [2018-12-02 01:59:15,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15 WrapperNode [2018-12-02 01:59:15,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 01:59:15,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 01:59:15,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 01:59:15,271 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 01:59:15,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 01:59:15,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 01:59:15,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 01:59:15,283 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 01:59:15,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... [2018-12-02 01:59:15,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 01:59:15,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 01:59:15,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 01:59:15,294 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 01:59:15,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 01:59:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 01:59:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 01:59:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 01:59:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 01:59:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 01:59:15,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 01:59:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-02 01:59:15,359 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-02 01:59:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-02 01:59:15,359 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-02 01:59:15,452 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 01:59:15,452 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 01:59:15,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:59:15 BoogieIcfgContainer [2018-12-02 01:59:15,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 01:59:15,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 01:59:15,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 01:59:15,456 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 01:59:15,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:59:15" (1/3) ... [2018-12-02 01:59:15,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c19f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:59:15, skipping insertion in model container [2018-12-02 01:59:15,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:59:15" (2/3) ... [2018-12-02 01:59:15,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c19f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:59:15, skipping insertion in model container [2018-12-02 01:59:15,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:59:15" (3/3) ... [2018-12-02 01:59:15,458 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-12-02 01:59:15,464 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 01:59:15,468 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 01:59:15,478 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 01:59:15,496 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 01:59:15,497 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 01:59:15,497 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 01:59:15,497 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 01:59:15,497 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 01:59:15,497 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 01:59:15,497 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 01:59:15,497 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 01:59:15,497 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 01:59:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-02 01:59:15,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-02 01:59:15,511 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:15,511 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:15,512 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:15,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:15,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-02 01:59:15,517 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:15,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:15,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:15,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:15,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:59:15,608 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:59:15,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 01:59:15,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 01:59:15,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 01:59:15,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:59:15,620 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-02 01:59:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:15,677 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-02 01:59:15,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 01:59:15,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-02 01:59:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:15,685 INFO L225 Difference]: With dead ends: 44 [2018-12-02 01:59:15,685 INFO L226 Difference]: Without dead ends: 30 [2018-12-02 01:59:15,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:59:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-02 01:59:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-02 01:59:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-02 01:59:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-02 01:59:15,712 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-02 01:59:15,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:15,712 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-02 01:59:15,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 01:59:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-02 01:59:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 01:59:15,713 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:15,714 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:15,714 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:15,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:15,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-02 01:59:15,714 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:15,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:15,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:15,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:15,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:59:15,743 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:59:15,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 01:59:15,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 01:59:15,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 01:59:15,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:59:15,745 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-02 01:59:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:15,783 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-02 01:59:15,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 01:59:15,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-02 01:59:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:15,785 INFO L225 Difference]: With dead ends: 36 [2018-12-02 01:59:15,785 INFO L226 Difference]: Without dead ends: 32 [2018-12-02 01:59:15,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:59:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-02 01:59:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-02 01:59:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-02 01:59:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-02 01:59:15,792 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-02 01:59:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:15,792 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-02 01:59:15,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 01:59:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-02 01:59:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-02 01:59:15,793 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:15,793 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:15,793 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:15,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-02 01:59:15,794 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:15,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:15,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:15,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:15,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 01:59:15,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:15,858 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:15,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:15,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 01:59:15,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:15,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-12-02 01:59:15,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 01:59:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 01:59:15,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-02 01:59:15,933 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-12-02 01:59:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:16,031 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-12-02 01:59:16,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 01:59:16,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-12-02 01:59:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:16,032 INFO L225 Difference]: With dead ends: 58 [2018-12-02 01:59:16,032 INFO L226 Difference]: Without dead ends: 34 [2018-12-02 01:59:16,033 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-12-02 01:59:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-02 01:59:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-12-02 01:59:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-02 01:59:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-12-02 01:59:16,037 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-12-02 01:59:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:16,037 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-12-02 01:59:16,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 01:59:16,037 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-12-02 01:59:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-02 01:59:16,038 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:16,038 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:16,038 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:16,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:16,038 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-12-02 01:59:16,038 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:16,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:16,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:16,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 01:59:16,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:16,068 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:16,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:16,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-02 01:59:16,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:16,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-02 01:59:16,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 01:59:16,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 01:59:16,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 01:59:16,102 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-12-02 01:59:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:16,163 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-12-02 01:59:16,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 01:59:16,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-12-02 01:59:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:16,164 INFO L225 Difference]: With dead ends: 43 [2018-12-02 01:59:16,164 INFO L226 Difference]: Without dead ends: 39 [2018-12-02 01:59:16,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-02 01:59:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-02 01:59:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-02 01:59:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-02 01:59:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-12-02 01:59:16,170 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-12-02 01:59:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:16,170 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-12-02 01:59:16,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 01:59:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-12-02 01:59:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-02 01:59:16,171 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:16,171 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:16,171 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:16,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-02 01:59:16,172 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:16,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-02 01:59:16,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:16,208 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:16,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:16,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-02 01:59:16,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:16,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-12-02 01:59:16,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 01:59:16,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 01:59:16,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-12-02 01:59:16,277 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-12-02 01:59:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:16,396 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-12-02 01:59:16,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 01:59:16,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-02 01:59:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:16,397 INFO L225 Difference]: With dead ends: 70 [2018-12-02 01:59:16,398 INFO L226 Difference]: Without dead ends: 39 [2018-12-02 01:59:16,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-12-02 01:59:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-02 01:59:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-02 01:59:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 01:59:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-12-02 01:59:16,405 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-12-02 01:59:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:16,405 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-12-02 01:59:16,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 01:59:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-12-02 01:59:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-02 01:59:16,407 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:16,407 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:16,407 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:16,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-12-02 01:59:16,407 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:16,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:16,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:16,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-02 01:59:16,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:16,457 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:16,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:16,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-02 01:59:16,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:16,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-12-02 01:59:16,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 01:59:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 01:59:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-02 01:59:16,514 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-12-02 01:59:16,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:16,605 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-12-02 01:59:16,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 01:59:16,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-12-02 01:59:16,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:16,606 INFO L225 Difference]: With dead ends: 61 [2018-12-02 01:59:16,606 INFO L226 Difference]: Without dead ends: 57 [2018-12-02 01:59:16,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-12-02 01:59:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-02 01:59:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-12-02 01:59:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-02 01:59:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-12-02 01:59:16,613 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-12-02 01:59:16,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:16,613 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-12-02 01:59:16,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 01:59:16,613 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-12-02 01:59:16,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-02 01:59:16,614 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:16,614 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:16,614 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:16,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:16,615 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-12-02 01:59:16,615 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:16,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:16,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:16,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-02 01:59:16,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:16,665 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:16,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:16,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-12-02 01:59:16,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:16,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-12-02 01:59:16,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 01:59:16,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 01:59:16,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-02 01:59:16,728 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-12-02 01:59:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:16,829 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-12-02 01:59:16,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 01:59:16,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-12-02 01:59:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:16,831 INFO L225 Difference]: With dead ends: 71 [2018-12-02 01:59:16,831 INFO L226 Difference]: Without dead ends: 67 [2018-12-02 01:59:16,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-12-02 01:59:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-02 01:59:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-12-02 01:59:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-02 01:59:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-12-02 01:59:16,841 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-12-02 01:59:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:16,841 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-12-02 01:59:16,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 01:59:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-12-02 01:59:16,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-02 01:59:16,843 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:16,843 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:16,844 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:16,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:16,844 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-12-02 01:59:16,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:16,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:16,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:16,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-12-02 01:59:16,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:16,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:16,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 01:59:16,945 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 01:59:16,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:59:16,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-12-02 01:59:17,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:17,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-12-02 01:59:17,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-02 01:59:17,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-02 01:59:17,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-12-02 01:59:17,035 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-12-02 01:59:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:17,354 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-12-02 01:59:17,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-02 01:59:17,354 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-12-02 01:59:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:17,356 INFO L225 Difference]: With dead ends: 146 [2018-12-02 01:59:17,356 INFO L226 Difference]: Without dead ends: 103 [2018-12-02 01:59:17,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-12-02 01:59:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-02 01:59:17,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-12-02 01:59:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-12-02 01:59:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-12-02 01:59:17,367 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-12-02 01:59:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:17,367 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-12-02 01:59:17,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-02 01:59:17,368 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-12-02 01:59:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-12-02 01:59:17,370 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:17,370 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:17,370 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:17,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:17,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2012686571, now seen corresponding path program 2 times [2018-12-02 01:59:17,371 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:17,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:17,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:17,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:59:17,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 78 proven. 181 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2018-12-02 01:59:17,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:17,466 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:17,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 01:59:17,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 01:59:17,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:59:17,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 54 proven. 196 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2018-12-02 01:59:17,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:17,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-12-02 01:59:17,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-02 01:59:17,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-02 01:59:17,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-12-02 01:59:17,607 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-12-02 01:59:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:18,060 INFO L93 Difference]: Finished difference Result 239 states and 535 transitions. [2018-12-02 01:59:18,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-02 01:59:18,061 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 175 [2018-12-02 01:59:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:18,062 INFO L225 Difference]: With dead ends: 239 [2018-12-02 01:59:18,063 INFO L226 Difference]: Without dead ends: 158 [2018-12-02 01:59:18,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2018-12-02 01:59:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-12-02 01:59:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2018-12-02 01:59:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-12-02 01:59:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 243 transitions. [2018-12-02 01:59:18,077 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 243 transitions. Word has length 175 [2018-12-02 01:59:18,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:18,077 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 243 transitions. [2018-12-02 01:59:18,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-02 01:59:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 243 transitions. [2018-12-02 01:59:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-12-02 01:59:18,079 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:18,079 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:18,079 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:18,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash -715662308, now seen corresponding path program 1 times [2018-12-02 01:59:18,080 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:18,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:18,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:18,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:59:18,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 105 proven. 93 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2018-12-02 01:59:18,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:18,149 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:18,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:18,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 99 proven. 155 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2018-12-02 01:59:18,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:18,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2018-12-02 01:59:18,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 01:59:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 01:59:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-12-02 01:59:18,268 INFO L87 Difference]: Start difference. First operand 139 states and 243 transitions. Second operand 13 states. [2018-12-02 01:59:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:18,477 INFO L93 Difference]: Finished difference Result 278 states and 563 transitions. [2018-12-02 01:59:18,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-02 01:59:18,478 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2018-12-02 01:59:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:18,479 INFO L225 Difference]: With dead ends: 278 [2018-12-02 01:59:18,479 INFO L226 Difference]: Without dead ends: 106 [2018-12-02 01:59:18,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-12-02 01:59:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-12-02 01:59:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2018-12-02 01:59:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-12-02 01:59:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2018-12-02 01:59:18,492 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 165 [2018-12-02 01:59:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:18,493 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2018-12-02 01:59:18,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 01:59:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2018-12-02 01:59:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-12-02 01:59:18,494 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:18,494 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:18,494 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:18,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 1 times [2018-12-02 01:59:18,495 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:18,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:18,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:18,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:18,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-12-02 01:59:18,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:18,568 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:18,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:18,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2018-12-02 01:59:18,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:18,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-02 01:59:18,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 01:59:18,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 01:59:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-02 01:59:18,631 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand 9 states. [2018-12-02 01:59:18,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:18,716 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2018-12-02 01:59:18,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-02 01:59:18,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 150 [2018-12-02 01:59:18,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:18,718 INFO L225 Difference]: With dead ends: 107 [2018-12-02 01:59:18,718 INFO L226 Difference]: Without dead ends: 100 [2018-12-02 01:59:18,718 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-12-02 01:59:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-12-02 01:59:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2018-12-02 01:59:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-12-02 01:59:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 131 transitions. [2018-12-02 01:59:18,726 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 131 transitions. Word has length 150 [2018-12-02 01:59:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:18,726 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 131 transitions. [2018-12-02 01:59:18,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 01:59:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 131 transitions. [2018-12-02 01:59:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-12-02 01:59:18,728 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:18,728 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:18,729 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:18,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:18,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1258139068, now seen corresponding path program 2 times [2018-12-02 01:59:18,729 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:18,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:18,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:18,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:18,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 226 proven. 25 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2018-12-02 01:59:18,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:18,822 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:59:18,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 01:59:18,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 01:59:18,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:59:18,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 240 proven. 71 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-12-02 01:59:18,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:18,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-12-02 01:59:18,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-02 01:59:18,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-02 01:59:18,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2018-12-02 01:59:18,959 INFO L87 Difference]: Start difference. First operand 98 states and 131 transitions. Second operand 19 states. [2018-12-02 01:59:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:19,259 INFO L93 Difference]: Finished difference Result 221 states and 330 transitions. [2018-12-02 01:59:19,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-02 01:59:19,260 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2018-12-02 01:59:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:19,261 INFO L225 Difference]: With dead ends: 221 [2018-12-02 01:59:19,261 INFO L226 Difference]: Without dead ends: 129 [2018-12-02 01:59:19,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2018-12-02 01:59:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-12-02 01:59:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2018-12-02 01:59:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-12-02 01:59:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2018-12-02 01:59:19,271 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 141 transitions. Word has length 191 [2018-12-02 01:59:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:19,272 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 141 transitions. [2018-12-02 01:59:19,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-02 01:59:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 141 transitions. [2018-12-02 01:59:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-12-02 01:59:19,274 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:19,274 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:19,275 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:19,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:19,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1834449656, now seen corresponding path program 3 times [2018-12-02 01:59:19,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:19,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:19,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:19,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:59:19,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 97 proven. 194 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2018-12-02 01:59:19,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:19,424 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/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 [2018-12-02 01:59:19,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:59:19,452 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-02 01:59:19,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:59:19,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 84 proven. 113 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2018-12-02 01:59:19,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:19,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2018-12-02 01:59:19,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-02 01:59:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-02 01:59:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2018-12-02 01:59:19,514 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand 18 states. [2018-12-02 01:59:19,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:19,904 INFO L93 Difference]: Finished difference Result 261 states and 386 transitions. [2018-12-02 01:59:19,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-02 01:59:19,904 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 163 [2018-12-02 01:59:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:19,905 INFO L225 Difference]: With dead ends: 261 [2018-12-02 01:59:19,905 INFO L226 Difference]: Without dead ends: 151 [2018-12-02 01:59:19,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2018-12-02 01:59:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-12-02 01:59:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2018-12-02 01:59:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-12-02 01:59:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2018-12-02 01:59:19,916 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 163 [2018-12-02 01:59:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:19,916 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2018-12-02 01:59:19,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-02 01:59:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2018-12-02 01:59:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-12-02 01:59:19,918 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:19,918 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:19,919 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:19,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times [2018-12-02 01:59:19,919 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:19,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:19,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:19,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:59:19,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-12-02 01:59:20,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:20,258 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/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 [2018-12-02 01:59:20,265 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:59:20,287 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:59:20,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:59:20,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-12-02 01:59:20,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:20,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-12-02 01:59:20,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-02 01:59:20,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-02 01:59:20,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-12-02 01:59:20,558 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand 36 states. [2018-12-02 01:59:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:20,815 INFO L93 Difference]: Finished difference Result 170 states and 223 transitions. [2018-12-02 01:59:20,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-02 01:59:20,815 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2018-12-02 01:59:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:20,816 INFO L225 Difference]: With dead ends: 170 [2018-12-02 01:59:20,816 INFO L226 Difference]: Without dead ends: 163 [2018-12-02 01:59:20,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2018-12-02 01:59:20,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-02 01:59:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2018-12-02 01:59:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-12-02 01:59:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2018-12-02 01:59:20,826 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 177 [2018-12-02 01:59:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:20,827 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2018-12-02 01:59:20,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-02 01:59:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2018-12-02 01:59:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-12-02 01:59:20,828 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:20,828 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:20,828 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:20,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1644588800, now seen corresponding path program 5 times [2018-12-02 01:59:20,829 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:20,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:20,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:20,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:59:20,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 163 proven. 138 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2018-12-02 01:59:20,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:20,881 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/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 [2018-12-02 01:59:20,888 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-02 01:59:20,911 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-12-02 01:59:20,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:59:20,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 682 proven. 4 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2018-12-02 01:59:20,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:20,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-02 01:59:20,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 01:59:20,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 01:59:20,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 01:59:20,945 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand 7 states. [2018-12-02 01:59:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:21,016 INFO L93 Difference]: Finished difference Result 295 states and 403 transitions. [2018-12-02 01:59:21,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 01:59:21,016 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 218 [2018-12-02 01:59:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:21,017 INFO L225 Difference]: With dead ends: 295 [2018-12-02 01:59:21,017 INFO L226 Difference]: Without dead ends: 151 [2018-12-02 01:59:21,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-12-02 01:59:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-12-02 01:59:21,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-12-02 01:59:21,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-12-02 01:59:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 197 transitions. [2018-12-02 01:59:21,027 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 197 transitions. Word has length 218 [2018-12-02 01:59:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:21,027 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 197 transitions. [2018-12-02 01:59:21,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 01:59:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 197 transitions. [2018-12-02 01:59:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-12-02 01:59:21,029 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:21,029 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:21,029 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:21,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -455828779, now seen corresponding path program 6 times [2018-12-02 01:59:21,029 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:21,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:21,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:21,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:59:21,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 157 proven. 290 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2018-12-02 01:59:21,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:21,183 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/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 [2018-12-02 01:59:21,188 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-02 01:59:21,218 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-12-02 01:59:21,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:59:21,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 167 proven. 154 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2018-12-02 01:59:21,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:21,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2018-12-02 01:59:21,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-02 01:59:21,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-02 01:59:21,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2018-12-02 01:59:21,303 INFO L87 Difference]: Start difference. First operand 151 states and 197 transitions. Second operand 21 states. [2018-12-02 01:59:21,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:21,756 INFO L93 Difference]: Finished difference Result 365 states and 532 transitions. [2018-12-02 01:59:21,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-12-02 01:59:21,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 204 [2018-12-02 01:59:21,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:21,757 INFO L225 Difference]: With dead ends: 365 [2018-12-02 01:59:21,757 INFO L226 Difference]: Without dead ends: 191 [2018-12-02 01:59:21,758 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2018-12-02 01:59:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-12-02 01:59:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 167. [2018-12-02 01:59:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-12-02 01:59:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 211 transitions. [2018-12-02 01:59:21,765 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 211 transitions. Word has length 204 [2018-12-02 01:59:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:21,765 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 211 transitions. [2018-12-02 01:59:21,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-02 01:59:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 211 transitions. [2018-12-02 01:59:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-12-02 01:59:21,766 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:59:21,766 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:59:21,766 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:59:21,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:59:21,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1318513955, now seen corresponding path program 7 times [2018-12-02 01:59:21,766 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 01:59:21,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 01:59:21,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:21,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:59:21,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:59:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 99 proven. 291 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2018-12-02 01:59:21,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:59:21,874 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/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 [2018-12-02 01:59:21,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:59:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:59:21,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:59:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 103 proven. 285 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-12-02 01:59:21,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 01:59:21,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2018-12-02 01:59:21,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 01:59:21,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 01:59:21,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-12-02 01:59:21,955 INFO L87 Difference]: Start difference. First operand 167 states and 211 transitions. Second operand 15 states. [2018-12-02 01:59:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:59:22,066 INFO L93 Difference]: Finished difference Result 170 states and 215 transitions. [2018-12-02 01:59:22,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 01:59:22,066 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 204 [2018-12-02 01:59:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:59:22,067 INFO L225 Difference]: With dead ends: 170 [2018-12-02 01:59:22,067 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 01:59:22,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-12-02 01:59:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 01:59:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 01:59:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 01:59:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 01:59:22,068 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2018-12-02 01:59:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:59:22,068 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 01:59:22,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 01:59:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 01:59:22,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 01:59:22,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-02 01:59:22,168 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 01:59:22,175 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 01:59:22,186 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 01:59:22,191 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 01:59:22,214 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 01:59:22,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 01:59:22,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 01:59:22,281 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-02 01:59:22,632 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 26 [2018-12-02 01:59:22,926 WARN L180 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 32 [2018-12-02 01:59:22,928 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-02 01:59:22,928 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-12-02 01:59:22,928 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-12-02 01:59:22,929 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (<= |fibo2_#in~n| fibo2_~n))) (or (and (<= fibo2_~n |fibo2_#in~n|) (<= 5 |fibo2_#in~n|) .cse0) (and (<= 1 |fibo2_#t~ret2|) (<= fibo2_~n 2) (<= |fibo2_#t~ret2| 1) .cse0 (<= 2 |fibo2_#in~n|)))) (or (< |fibo2_#in~n| 3) (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (<= 6 |fibo2_#in~n|))) [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-12-02 01:59:22,929 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (or (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2)) (< 4 |fibo1_#in~n|) (<= |fibo1_#in~n| 3)) (<= fibo1_~n |fibo1_#in~n|) (or (and (<= 2 |fibo1_#in~n|) (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1)) (< 3 |fibo1_#in~n|)) (<= |fibo1_#in~n| fibo1_~n) (or (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|)) (<= 7 |fibo1_#in~n|) (<= |fibo1_#in~n| 5))) [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-12-02 01:59:22,929 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-12-02 01:59:22,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:59:22 BoogieIcfgContainer [2018-12-02 01:59:22,931 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 01:59:22,931 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 01:59:22,931 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 01:59:22,931 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 01:59:22,932 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:59:15" (3/4) ... [2018-12-02 01:59:22,935 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 01:59:22,939 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 01:59:22,940 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 01:59:22,940 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-12-02 01:59:22,940 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-12-02 01:59:22,942 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-02 01:59:22,943 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-02 01:59:22,943 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 01:59:22,970 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b2b31a05-3314-4f01-aad7-43c626384136/bin-2019/uautomizer/witness.graphml [2018-12-02 01:59:22,970 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 01:59:22,970 INFO L168 Benchmark]: Toolchain (without parser) took 7830.87 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 432.0 MB). Free memory was 952.2 MB in the beginning and 1.4 GB in the end (delta: -460.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:59:22,971 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:59:22,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.57 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-02 01:59:22,971 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.80 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:59:22,971 INFO L168 Benchmark]: Boogie Preprocessor took 10.70 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:59:22,971 INFO L168 Benchmark]: RCFGBuilder took 159.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 941.4 MB in the beginning and 1.1 GB in the end (delta: -181.2 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2018-12-02 01:59:22,972 INFO L168 Benchmark]: TraceAbstraction took 7477.58 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 292.6 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -301.4 MB). Peak memory consumption was 545.2 MB. Max. memory is 11.5 GB. [2018-12-02 01:59:22,972 INFO L168 Benchmark]: Witness Printer took 38.75 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-12-02 01:59:22,973 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 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 129.57 ms. Allocated memory is still 1.0 GB. Free memory was 952.2 MB in the beginning and 941.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.80 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.70 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 159.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 941.4 MB in the beginning and 1.1 GB in the end (delta: -181.2 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7477.58 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 292.6 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -301.4 MB). Peak memory consumption was 545.2 MB. Max. memory is 11.5 GB. * Witness Printer took 38.75 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 7.4s OverallTime, 17 OverallIterations, 16 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 553 SDtfs, 647 SDslu, 4419 SDs, 0 SdLazy, 4488 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2249 GetRequests, 1908 SyntacticMatches, 17 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=167occurred in iteration=16, 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, 151 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 533 PreInvPairs, 1089 NumberOfFragments, 130 HoareAnnotationTreeSize, 533 FomulaSimplifications, 30494 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 11 FomulaSimplificationsInter, 4964 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 3853 NumberOfCodeBlocks, 3676 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 3821 ConstructedInterpolants, 0 QuantifiedInterpolants, 1066733 SizeOfPredicates, 70 NumberOfNonLiveVariables, 3873 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 13031/15976 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...