./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-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_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 fe571d33601eb001defa960d70b02ea99b59263c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 06:16:22,636 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 06:16:22,637 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 06:16:22,643 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 06:16:22,643 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 06:16:22,644 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 06:16:22,645 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 06:16:22,645 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 06:16:22,646 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 06:16:22,647 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 06:16:22,647 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 06:16:22,647 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 06:16:22,648 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 06:16:22,648 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 06:16:22,649 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 06:16:22,649 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 06:16:22,649 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 06:16:22,650 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 06:16:22,651 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 06:16:22,652 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 06:16:22,652 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 06:16:22,653 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 06:16:22,654 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 06:16:22,654 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 06:16:22,654 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 06:16:22,655 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 06:16:22,655 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 06:16:22,655 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 06:16:22,656 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 06:16:22,656 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 06:16:22,656 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 06:16:22,657 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 06:16:22,657 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 06:16:22,657 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 06:16:22,657 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 06:16:22,658 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 06:16:22,658 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-02 06:16:22,665 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 06:16:22,665 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 06:16:22,666 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 06:16:22,666 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 06:16:22,666 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-02 06:16:22,666 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-02 06:16:22,666 INFO L133 SettingsManager]: * Use SBE=true [2018-12-02 06:16:22,666 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 06:16:22,666 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 06:16:22,666 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 06:16:22,667 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 06:16:22,667 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 06:16:22,668 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 06:16:22,668 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 06:16:22,668 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 06:16:22,668 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 06:16:22,668 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-02 06:16:22,668 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 06:16:22,668 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 06:16:22,668 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_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 -> fe571d33601eb001defa960d70b02ea99b59263c [2018-12-02 06:16:22,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 06:16:22,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 06:16:22,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 06:16:22,696 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 06:16:22,696 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 06:16:22,697 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c [2018-12-02 06:16:22,734 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/data/e21cebf7f/417151f2f5d14c8fbfd3ef4b0289f164/FLAG0a44e17c7 [2018-12-02 06:16:23,142 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 06:16:23,143 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/sv-benchmarks/c/recursive-simple/fibo_2calls_5_false-unreach-call_true-termination.c [2018-12-02 06:16:23,146 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/data/e21cebf7f/417151f2f5d14c8fbfd3ef4b0289f164/FLAG0a44e17c7 [2018-12-02 06:16:23,156 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/data/e21cebf7f/417151f2f5d14c8fbfd3ef4b0289f164 [2018-12-02 06:16:23,158 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 06:16:23,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 06:16:23,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 06:16:23,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 06:16:23,161 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 06:16:23,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,163 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 06:16:23, skipping insertion in model container [2018-12-02 06:16:23,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 06:16:23,178 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 06:16:23,275 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 06:16:23,277 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 06:16:23,287 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 06:16:23,294 INFO L195 MainTranslator]: Completed translation [2018-12-02 06:16:23,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23 WrapperNode [2018-12-02 06:16:23,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 06:16:23,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 06:16:23,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 06:16:23,295 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 06:16:23,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,307 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 06:16:23,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 06:16:23,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 06:16:23,307 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 06:16:23,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... [2018-12-02 06:16:23,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 06:16:23,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 06:16:23,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 06:16:23,318 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 06:16:23,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:23,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 06:16:23,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 06:16:23,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 06:16:23,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 06:16:23,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 06:16:23,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 06:16:23,380 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-02 06:16:23,380 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-02 06:16:23,380 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-02 06:16:23,381 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-02 06:16:23,473 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 06:16:23,473 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 06:16:23,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:16:23 BoogieIcfgContainer [2018-12-02 06:16:23,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 06:16:23,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 06:16:23,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 06:16:23,475 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 06:16:23,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:16:23" (1/3) ... [2018-12-02 06:16:23,476 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 06:16:23, skipping insertion in model container [2018-12-02 06:16:23,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:16:23" (2/3) ... [2018-12-02 06:16:23,476 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 06:16:23, skipping insertion in model container [2018-12-02 06:16:23,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:16:23" (3/3) ... [2018-12-02 06:16:23,477 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5_false-unreach-call_true-termination.c [2018-12-02 06:16:23,483 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 06:16:23,487 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 06:16:23,495 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 06:16:23,512 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 06:16:23,512 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 06:16:23,512 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 06:16:23,512 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 06:16:23,512 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 06:16:23,512 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 06:16:23,512 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 06:16:23,513 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 06:16:23,513 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 06:16:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-02 06:16:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-02 06:16:23,526 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:23,526 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:16:23,527 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:23,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:23,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-02 06:16:23,532 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:23,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:23,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:23,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:23,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:23,622 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 06:16:23,624 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 06:16:23,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 06:16:23,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 06:16:23,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 06:16:23,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 06:16:23,637 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-02 06:16:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:23,701 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-02 06:16:23,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 06:16:23,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-02 06:16:23,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:23,708 INFO L225 Difference]: With dead ends: 44 [2018-12-02 06:16:23,708 INFO L226 Difference]: Without dead ends: 30 [2018-12-02 06:16:23,710 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 06:16:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-02 06:16:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-02 06:16:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-02 06:16:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-02 06:16:23,735 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-02 06:16:23,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:23,735 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-02 06:16:23,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 06:16:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-02 06:16:23,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 06:16:23,736 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:23,736 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:16:23,736 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:23,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:23,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-02 06:16:23,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:23,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:23,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:23,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:23,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:23,767 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 06:16:23,767 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 06:16:23,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 06:16:23,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 06:16:23,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 06:16:23,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 06:16:23,769 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-02 06:16:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:23,810 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-02 06:16:23,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 06:16:23,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-02 06:16:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:23,811 INFO L225 Difference]: With dead ends: 36 [2018-12-02 06:16:23,811 INFO L226 Difference]: Without dead ends: 32 [2018-12-02 06:16:23,811 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 06:16:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-02 06:16:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-02 06:16:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-02 06:16:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-02 06:16:23,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-02 06:16:23,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:23,815 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-02 06:16:23,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 06:16:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-02 06:16:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-02 06:16:23,816 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:23,816 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 06:16:23,816 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:23,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-02 06:16:23,817 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:23,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:23,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:23,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:23,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:23,859 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 06:16:23,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:23,859 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:23,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:23,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:23,918 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 06:16:23,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:23,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-12-02 06:16:23,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-02 06:16:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-02 06:16:23,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-02 06:16:23,934 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-12-02 06:16:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:24,035 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-12-02 06:16:24,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 06:16:24,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-12-02 06:16:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:24,037 INFO L225 Difference]: With dead ends: 58 [2018-12-02 06:16:24,037 INFO L226 Difference]: Without dead ends: 34 [2018-12-02 06:16:24,038 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 06:16:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-02 06:16:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-12-02 06:16:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-02 06:16:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-12-02 06:16:24,044 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-12-02 06:16:24,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:24,044 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-12-02 06:16:24,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-02 06:16:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-12-02 06:16:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-02 06:16:24,045 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:24,046 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 06:16:24,046 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:24,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-12-02 06:16:24,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:24,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:24,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:24,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:24,086 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 06:16:24,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:24,087 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:24,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:24,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:24,108 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 06:16:24,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:24,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-02 06:16:24,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 06:16:24,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 06:16:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 06:16:24,131 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-12-02 06:16:24,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:24,183 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-12-02 06:16:24,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 06:16:24,184 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-12-02 06:16:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:24,185 INFO L225 Difference]: With dead ends: 43 [2018-12-02 06:16:24,185 INFO L226 Difference]: Without dead ends: 39 [2018-12-02 06:16:24,185 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 06:16:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-02 06:16:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-12-02 06:16:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-12-02 06:16:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-12-02 06:16:24,189 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-12-02 06:16:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:24,190 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-12-02 06:16:24,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 06:16:24,190 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-12-02 06:16:24,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-02 06:16:24,190 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:24,191 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 06:16:24,191 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:24,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:24,191 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-02 06:16:24,191 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:24,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:24,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:24,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:24,222 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 06:16:24,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:24,222 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:24,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:24,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:24,271 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 06:16:24,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:24,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-12-02 06:16:24,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 06:16:24,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 06:16:24,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-12-02 06:16:24,286 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-12-02 06:16:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:24,414 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-12-02 06:16:24,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-02 06:16:24,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-02 06:16:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:24,415 INFO L225 Difference]: With dead ends: 70 [2018-12-02 06:16:24,416 INFO L226 Difference]: Without dead ends: 39 [2018-12-02 06:16:24,416 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 06:16:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-02 06:16:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-02 06:16:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 06:16:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-12-02 06:16:24,423 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-12-02 06:16:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:24,423 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-12-02 06:16:24,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 06:16:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-12-02 06:16:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-02 06:16:24,424 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:24,425 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 06:16:24,425 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:24,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-12-02 06:16:24,425 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:24,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:24,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:24,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:24,464 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 06:16:24,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:24,465 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:24,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:24,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:24,507 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 06:16:24,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:24,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-12-02 06:16:24,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 06:16:24,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 06:16:24,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-02 06:16:24,522 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-12-02 06:16:24,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:24,608 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-12-02 06:16:24,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 06:16:24,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-12-02 06:16:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:24,609 INFO L225 Difference]: With dead ends: 61 [2018-12-02 06:16:24,609 INFO L226 Difference]: Without dead ends: 57 [2018-12-02 06:16:24,610 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 06:16:24,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-02 06:16:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-12-02 06:16:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-02 06:16:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-12-02 06:16:24,620 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-12-02 06:16:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:24,620 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-12-02 06:16:24,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 06:16:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-12-02 06:16:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-12-02 06:16:24,621 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:24,622 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 06:16:24,622 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:24,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:24,622 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-12-02 06:16:24,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:24,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:24,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:24,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:24,671 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 06:16:24,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:24,671 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:24,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:24,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:24,713 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 06:16:24,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:24,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-12-02 06:16:24,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 06:16:24,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 06:16:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-12-02 06:16:24,729 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-12-02 06:16:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:24,835 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-12-02 06:16:24,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 06:16:24,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-12-02 06:16:24,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:24,836 INFO L225 Difference]: With dead ends: 71 [2018-12-02 06:16:24,836 INFO L226 Difference]: Without dead ends: 67 [2018-12-02 06:16:24,837 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 06:16:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-02 06:16:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-12-02 06:16:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-02 06:16:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-12-02 06:16:24,844 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-12-02 06:16:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:24,845 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-12-02 06:16:24,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 06:16:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-12-02 06:16:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-02 06:16:24,846 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:24,846 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 06:16:24,846 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:24,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:24,846 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-12-02 06:16:24,847 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:24,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:24,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:24,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:24,918 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 06:16:24,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:24,918 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:24,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 06:16:24,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 06:16:24,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:16:24,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-12-02 06:16:24,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:24,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-12-02 06:16:24,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-02 06:16:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-02 06:16:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-12-02 06:16:24,997 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 14 states. [2018-12-02 06:16:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:25,271 INFO L93 Difference]: Finished difference Result 127 states and 238 transitions. [2018-12-02 06:16:25,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-02 06:16:25,271 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2018-12-02 06:16:25,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:25,273 INFO L225 Difference]: With dead ends: 127 [2018-12-02 06:16:25,273 INFO L226 Difference]: Without dead ends: 84 [2018-12-02 06:16:25,274 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2018-12-02 06:16:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-12-02 06:16:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2018-12-02 06:16:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-02 06:16:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 101 transitions. [2018-12-02 06:16:25,284 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 101 transitions. Word has length 80 [2018-12-02 06:16:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:25,285 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 101 transitions. [2018-12-02 06:16:25,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-02 06:16:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 101 transitions. [2018-12-02 06:16:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-12-02 06:16:25,287 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:25,287 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:16:25,287 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:25,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1162571493, now seen corresponding path program 1 times [2018-12-02 06:16:25,287 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:25,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:25,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:25,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:16:25,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 74 proven. 14 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-12-02 06:16:25,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:25,358 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:25,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:25,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-12-02 06:16:25,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:25,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2018-12-02 06:16:25,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 06:16:25,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 06:16:25,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-12-02 06:16:25,442 INFO L87 Difference]: Start difference. First operand 65 states and 101 transitions. Second operand 15 states. [2018-12-02 06:16:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:25,775 INFO L93 Difference]: Finished difference Result 180 states and 349 transitions. [2018-12-02 06:16:25,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-02 06:16:25,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 95 [2018-12-02 06:16:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:25,778 INFO L225 Difference]: With dead ends: 180 [2018-12-02 06:16:25,778 INFO L226 Difference]: Without dead ends: 115 [2018-12-02 06:16:25,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2018-12-02 06:16:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-12-02 06:16:25,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2018-12-02 06:16:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-02 06:16:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2018-12-02 06:16:25,792 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 95 [2018-12-02 06:16:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:25,793 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2018-12-02 06:16:25,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 06:16:25,793 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2018-12-02 06:16:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-12-02 06:16:25,795 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:25,795 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 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 06:16:25,795 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:25,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 2 times [2018-12-02 06:16:25,795 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:25,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:25,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:25,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:25,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-12-02 06:16:25,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:25,870 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:25,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 06:16:25,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 06:16:25,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:16:25,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-12-02 06:16:25,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:25,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2018-12-02 06:16:25,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 06:16:25,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 06:16:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-12-02 06:16:25,940 INFO L87 Difference]: Start difference. First operand 97 states and 159 transitions. Second operand 15 states. [2018-12-02 06:16:26,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:26,247 INFO L93 Difference]: Finished difference Result 253 states and 504 transitions. [2018-12-02 06:16:26,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-02 06:16:26,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-12-02 06:16:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:26,249 INFO L225 Difference]: With dead ends: 253 [2018-12-02 06:16:26,249 INFO L226 Difference]: Without dead ends: 166 [2018-12-02 06:16:26,250 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2018-12-02 06:16:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-12-02 06:16:26,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2018-12-02 06:16:26,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-12-02 06:16:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 275 transitions. [2018-12-02 06:16:26,262 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 275 transitions. Word has length 82 [2018-12-02 06:16:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:26,262 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 275 transitions. [2018-12-02 06:16:26,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 06:16:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 275 transitions. [2018-12-02 06:16:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-12-02 06:16:26,264 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:26,264 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:16:26,264 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:26,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:26,264 INFO L82 PathProgramCache]: Analyzing trace with hash -224594541, now seen corresponding path program 1 times [2018-12-02 06:16:26,264 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:26,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:26,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:26,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:16:26,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 89 proven. 54 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-12-02 06:16:26,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:26,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:26,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:26,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2018-12-02 06:16:26,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:26,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2018-12-02 06:16:26,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 06:16:26,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 06:16:26,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-12-02 06:16:26,408 INFO L87 Difference]: Start difference. First operand 154 states and 275 transitions. Second operand 15 states. [2018-12-02 06:16:26,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:26,701 INFO L93 Difference]: Finished difference Result 352 states and 723 transitions. [2018-12-02 06:16:26,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-02 06:16:26,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 124 [2018-12-02 06:16:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:26,702 INFO L225 Difference]: With dead ends: 352 [2018-12-02 06:16:26,702 INFO L226 Difference]: Without dead ends: 88 [2018-12-02 06:16:26,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2018-12-02 06:16:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-02 06:16:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2018-12-02 06:16:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-02 06:16:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2018-12-02 06:16:26,707 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 124 [2018-12-02 06:16:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:26,708 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2018-12-02 06:16:26,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 06:16:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2018-12-02 06:16:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-12-02 06:16:26,708 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:26,708 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:16:26,709 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:26,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash 235412830, now seen corresponding path program 2 times [2018-12-02 06:16:26,709 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:26,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:26,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:26,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 06:16:26,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 06:16:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2018-12-02 06:16:26,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 06:16:26,757 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/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 06:16:26,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 06:16:26,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 06:16:26,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 06:16:26,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 06:16:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2018-12-02 06:16:26,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 06:16:26,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-12-02 06:16:26,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 06:16:26,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 06:16:26,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-12-02 06:16:26,835 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2018-12-02 06:16:26,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 06:16:26,988 INFO L93 Difference]: Finished difference Result 155 states and 193 transitions. [2018-12-02 06:16:26,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 06:16:26,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2018-12-02 06:16:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 06:16:26,988 INFO L225 Difference]: With dead ends: 155 [2018-12-02 06:16:26,989 INFO L226 Difference]: Without dead ends: 85 [2018-12-02 06:16:26,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-12-02 06:16:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-12-02 06:16:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2018-12-02 06:16:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-12-02 06:16:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2018-12-02 06:16:26,992 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 108 [2018-12-02 06:16:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 06:16:26,992 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2018-12-02 06:16:26,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 06:16:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2018-12-02 06:16:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-12-02 06:16:26,993 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 06:16:26,993 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 06:16:26,993 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 06:16:26,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 06:16:26,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2018-12-02 06:16:26,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-02 06:16:26,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-02 06:16:26,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:26,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 06:16:26,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 06:16:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 06:16:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 06:16:27,016 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 06:16:27,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:16:27 BoogieIcfgContainer [2018-12-02 06:16:27,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 06:16:27,042 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 06:16:27,042 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 06:16:27,042 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 06:16:27,043 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:16:23" (3/4) ... [2018-12-02 06:16:27,044 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 06:16:27,087 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8d0f174d-e71f-42d8-9845-fd6cbabd8457/bin-2019/uautomizer/witness.graphml [2018-12-02 06:16:27,087 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 06:16:27,088 INFO L168 Benchmark]: Toolchain (without parser) took 3929.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 953.3 MB in the beginning and 1.0 GB in the end (delta: -67.6 MB). Peak memory consumption was 89.7 MB. Max. memory is 11.5 GB. [2018-12-02 06:16:27,089 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 06:16:27,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.05 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-12-02 06:16:27,089 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.85 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 06:16:27,089 INFO L168 Benchmark]: Boogie Preprocessor took 10.51 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 06:16:27,089 INFO L168 Benchmark]: RCFGBuilder took 155.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -151.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2018-12-02 06:16:27,089 INFO L168 Benchmark]: TraceAbstraction took 3568.28 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 49.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 68.2 MB). Peak memory consumption was 117.5 MB. Max. memory is 11.5 GB. [2018-12-02 06:16:27,089 INFO L168 Benchmark]: Witness Printer took 45.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 11.5 GB. [2018-12-02 06:16:27,090 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 136.05 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 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 11.85 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.51 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 155.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -151.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3568.28 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 49.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 68.2 MB). Peak memory consumption was 117.5 MB. Max. memory is 11.5 GB. * Witness Printer took 45.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; VAL [x=5] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L37] int result = fibo1(x); [L38] COND TRUE result == 5 VAL [result=5, x=5] [L39] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. UNSAFE Result, 3.5s OverallTime, 13 OverallIterations, 9 TraceHistogramMax, 1.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 335 SDtfs, 428 SDslu, 1886 SDs, 0 SdLazy, 2531 SolverSat, 395 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 856 GetRequests, 670 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 103 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 1486 NumberOfCodeBlocks, 1486 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1355 ConstructedInterpolants, 0 QuantifiedInterpolants, 171413 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1520 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 1904/2314 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...