./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 595c6555624af5bbcf79585a20acb2500e3eeee8 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 13:20:16,936 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:20:16,937 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:20:16,946 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:20:16,946 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:20:16,947 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:20:16,947 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:20:16,948 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:20:16,950 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:20:16,950 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:20:16,951 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:20:16,951 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:20:16,952 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:20:16,952 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:20:16,953 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:20:16,954 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:20:16,954 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:20:16,956 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:20:16,957 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:20:16,958 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:20:16,959 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:20:16,959 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:20:16,961 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:20:16,961 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:20:16,961 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:20:16,962 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:20:16,963 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:20:16,963 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:20:16,964 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:20:16,965 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:20:16,965 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:20:16,965 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:20:16,965 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:20:16,966 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:20:16,966 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:20:16,967 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:20:16,967 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 13:20:16,976 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:20:16,977 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:20:16,977 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:20:16,977 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:20:16,978 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:20:16,978 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:20:16,978 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:20:16,978 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:20:16,978 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:20:16,978 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:20:16,978 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:20:16,979 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:20:16,979 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:20:16,979 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:20:16,979 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:20:16,979 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:20:16,979 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:20:16,979 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:20:16,979 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:20:16,980 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:20:16,980 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:20:16,980 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:20:16,980 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:20:16,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:20:16,980 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:20:16,980 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:20:16,980 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:20:16,981 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:20:16,981 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:20:16,981 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:20:16,981 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_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-11-28 13:20:17,003 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:20:17,012 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:20:17,015 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:20:17,016 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:20:17,016 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:20:17,017 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-28 13:20:17,059 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/data/78f152215/c2f7440776c340809d683ed8f929903a/FLAG01e9be196 [2018-11-28 13:20:17,453 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:20:17,454 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-28 13:20:17,459 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/data/78f152215/c2f7440776c340809d683ed8f929903a/FLAG01e9be196 [2018-11-28 13:20:17,469 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/data/78f152215/c2f7440776c340809d683ed8f929903a [2018-11-28 13:20:17,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:20:17,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:20:17,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:20:17,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:20:17,475 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:20:17,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d7050d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17, skipping insertion in model container [2018-11-28 13:20:17,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:20:17,493 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:20:17,598 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:20:17,600 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:20:17,611 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:20:17,619 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:20:17,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17 WrapperNode [2018-11-28 13:20:17,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:20:17,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:20:17,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:20:17,621 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:20:17,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:20:17,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:20:17,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:20:17,635 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:20:17,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... [2018-11-28 13:20:17,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:20:17,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:20:17,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:20:17,647 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:20:17,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:20:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:20:17,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:20:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:20:17,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:20:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:20:17,723 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:20:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-11-28 13:20:17,723 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-11-28 13:20:17,723 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-11-28 13:20:17,724 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-11-28 13:20:17,836 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:20:17,837 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 13:20:17,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:20:17 BoogieIcfgContainer [2018-11-28 13:20:17,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:20:17,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:20:17,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:20:17,841 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:20:17,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:20:17" (1/3) ... [2018-11-28 13:20:17,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af64642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:20:17, skipping insertion in model container [2018-11-28 13:20:17,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:20:17" (2/3) ... [2018-11-28 13:20:17,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af64642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:20:17, skipping insertion in model container [2018-11-28 13:20:17,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:20:17" (3/3) ... [2018-11-28 13:20:17,843 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-11-28 13:20:17,849 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:20:17,853 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 13:20:17,862 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 13:20:17,880 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:20:17,880 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:20:17,880 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:20:17,880 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:20:17,881 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:20:17,881 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:20:17,881 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:20:17,881 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:20:17,881 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:20:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-11-28 13:20:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 13:20:17,900 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:17,900 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:17,902 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:17,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-11-28 13:20:17,906 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:17,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:17,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:17,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:17,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:20:18,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:20:18,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:20:18,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:20:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:20:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:20:18,049 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-11-28 13:20:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:18,154 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-11-28 13:20:18,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:20:18,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 13:20:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:18,163 INFO L225 Difference]: With dead ends: 44 [2018-11-28 13:20:18,163 INFO L226 Difference]: Without dead ends: 30 [2018-11-28 13:20:18,166 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 [2018-11-28 13:20:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-28 13:20:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-28 13:20:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 13:20:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 13:20:18,203 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-11-28 13:20:18,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:18,203 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 13:20:18,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:20:18,203 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 13:20:18,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 13:20:18,205 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:18,205 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:18,205 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:18,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:18,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-11-28 13:20:18,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:18,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:18,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:18,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:18,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 13:20:18,262 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:20:18,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:20:18,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:20:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:20:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:20:18,264 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-11-28 13:20:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:18,363 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-11-28 13:20:18,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:20:18,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 13:20:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:18,364 INFO L225 Difference]: With dead ends: 36 [2018-11-28 13:20:18,364 INFO L226 Difference]: Without dead ends: 32 [2018-11-28 13:20:18,365 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 [2018-11-28 13:20:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-28 13:20:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-11-28 13:20:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-28 13:20:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-11-28 13:20:18,371 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-11-28 13:20:18,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:18,371 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-11-28 13:20:18,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:20:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-11-28 13:20:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 13:20:18,372 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:18,373 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] [2018-11-28 13:20:18,373 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:18,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-11-28 13:20:18,373 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:18,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:18,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:18,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:18,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 13:20:18,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:18,459 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:18,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:18,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 13:20:18,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:18,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-28 13:20:18,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 13:20:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 13:20:18,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-11-28 13:20:18,570 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2018-11-28 13:20:18,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:18,738 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2018-11-28 13:20:18,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:20:18,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2018-11-28 13:20:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:18,739 INFO L225 Difference]: With dead ends: 58 [2018-11-28 13:20:18,740 INFO L226 Difference]: Without dead ends: 34 [2018-11-28 13:20:18,740 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:20:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-28 13:20:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2018-11-28 13:20:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-28 13:20:18,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-28 13:20:18,748 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2018-11-28 13:20:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:18,748 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-28 13:20:18,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 13:20:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-28 13:20:18,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 13:20:18,750 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:18,750 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] [2018-11-28 13:20:18,750 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:18,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:18,751 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2018-11-28 13:20:18,751 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:18,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:18,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:18,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:18,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 13:20:18,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:18,796 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:18,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:18,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 13:20:18,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:18,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-28 13:20:18,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-28 13:20:18,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-28 13:20:18,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-28 13:20:18,849 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2018-11-28 13:20:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:18,945 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2018-11-28 13:20:18,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 13:20:18,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-28 13:20:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:18,947 INFO L225 Difference]: With dead ends: 43 [2018-11-28 13:20:18,947 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 13:20:18,947 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 [2018-11-28 13:20:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 13:20:18,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-11-28 13:20:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-28 13:20:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-11-28 13:20:18,955 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2018-11-28 13:20:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:18,956 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2018-11-28 13:20:18,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-28 13:20:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2018-11-28 13:20:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-28 13:20:18,957 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:18,958 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] [2018-11-28 13:20:18,958 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:18,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:18,958 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-11-28 13:20:18,958 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:18,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:18,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:18,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:18,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 13:20:19,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:19,048 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:19,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:19,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 13:20:19,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:19,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2018-11-28 13:20:19,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:20:19,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:20:19,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:20:19,169 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2018-11-28 13:20:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:19,348 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2018-11-28 13:20:19,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:20:19,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-11-28 13:20:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:19,350 INFO L225 Difference]: With dead ends: 70 [2018-11-28 13:20:19,350 INFO L226 Difference]: Without dead ends: 39 [2018-11-28 13:20:19,351 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:20:19,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-28 13:20:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-28 13:20:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-28 13:20:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2018-11-28 13:20:19,359 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2018-11-28 13:20:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:19,360 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2018-11-28 13:20:19,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:20:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2018-11-28 13:20:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 13:20:19,361 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:19,362 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] [2018-11-28 13:20:19,362 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:19,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2018-11-28 13:20:19,362 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:19,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:19,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:19,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:19,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-28 13:20:19,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:19,424 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:19,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:19,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-28 13:20:19,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:19,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2018-11-28 13:20:19,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:20:19,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:20:19,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:20:19,509 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 10 states. [2018-11-28 13:20:19,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:19,637 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2018-11-28 13:20:19,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:20:19,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-11-28 13:20:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:19,639 INFO L225 Difference]: With dead ends: 61 [2018-11-28 13:20:19,639 INFO L226 Difference]: Without dead ends: 57 [2018-11-28 13:20:19,640 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 [2018-11-28 13:20:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-28 13:20:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2018-11-28 13:20:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-28 13:20:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-11-28 13:20:19,654 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 40 [2018-11-28 13:20:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:19,654 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2018-11-28 13:20:19,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:20:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2018-11-28 13:20:19,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-28 13:20:19,656 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:19,657 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] [2018-11-28 13:20:19,657 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:19,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:19,657 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2018-11-28 13:20:19,657 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:19,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:19,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:19,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:19,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-28 13:20:19,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:19,721 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:19,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:19,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-11-28 13:20:19,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:19,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2018-11-28 13:20:19,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:20:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:20:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:20:19,819 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 10 states. [2018-11-28 13:20:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:19,936 INFO L93 Difference]: Finished difference Result 71 states and 118 transitions. [2018-11-28 13:20:19,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:20:19,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2018-11-28 13:20:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:19,938 INFO L225 Difference]: With dead ends: 71 [2018-11-28 13:20:19,938 INFO L226 Difference]: Without dead ends: 67 [2018-11-28 13:20:19,938 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 [2018-11-28 13:20:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-28 13:20:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2018-11-28 13:20:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-28 13:20:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2018-11-28 13:20:19,946 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 54 [2018-11-28 13:20:19,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:19,947 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2018-11-28 13:20:19,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:20:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2018-11-28 13:20:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-28 13:20:19,949 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:19,949 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] [2018-11-28 13:20:19,949 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:19,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash 671849284, now seen corresponding path program 2 times [2018-11-28 13:20:19,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:19,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:19,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:19,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:19,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-28 13:20:20,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:20,073 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:20,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:20:20,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:20:20,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:20:20,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-11-28 13:20:20,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:20,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-11-28 13:20:20,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-28 13:20:20,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-28 13:20:20,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:20:20,224 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand 16 states. [2018-11-28 13:20:20,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:20,642 INFO L93 Difference]: Finished difference Result 146 states and 299 transitions. [2018-11-28 13:20:20,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 13:20:20,642 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2018-11-28 13:20:20,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:20,644 INFO L225 Difference]: With dead ends: 146 [2018-11-28 13:20:20,645 INFO L226 Difference]: Without dead ends: 103 [2018-11-28 13:20:20,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2018-11-28 13:20:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-28 13:20:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2018-11-28 13:20:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-28 13:20:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 157 transitions. [2018-11-28 13:20:20,668 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 157 transitions. Word has length 80 [2018-11-28 13:20:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:20,668 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 157 transitions. [2018-11-28 13:20:20,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-28 13:20:20,668 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 157 transitions. [2018-11-28 13:20:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-11-28 13:20:20,672 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:20,673 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:20,673 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:20,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:20,673 INFO L82 PathProgramCache]: Analyzing trace with hash 389486837, now seen corresponding path program 2 times [2018-11-28 13:20:20,673 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:20,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:20,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:20,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:20:20,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 73 proven. 134 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-11-28 13:20:20,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:20,823 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:20,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:20:20,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:20:20,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:20:20,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 49 proven. 149 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-11-28 13:20:21,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:21,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2018-11-28 13:20:21,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 13:20:21,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 13:20:21,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-11-28 13:20:21,015 INFO L87 Difference]: Start difference. First operand 87 states and 157 transitions. Second operand 18 states. [2018-11-28 13:20:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:21,589 INFO L93 Difference]: Finished difference Result 239 states and 535 transitions. [2018-11-28 13:20:21,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-28 13:20:21,590 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 148 [2018-11-28 13:20:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:21,592 INFO L225 Difference]: With dead ends: 239 [2018-11-28 13:20:21,592 INFO L226 Difference]: Without dead ends: 158 [2018-11-28 13:20:21,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2018-11-28 13:20:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-28 13:20:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2018-11-28 13:20:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-28 13:20:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 243 transitions. [2018-11-28 13:20:21,616 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 243 transitions. Word has length 148 [2018-11-28 13:20:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:21,617 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 243 transitions. [2018-11-28 13:20:21,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 13:20:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 243 transitions. [2018-11-28 13:20:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-28 13:20:21,621 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:21,621 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:21,621 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:21,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:21,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1341741100, now seen corresponding path program 1 times [2018-11-28 13:20:21,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:21,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:21,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:21,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:20:21,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 109 proven. 135 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2018-11-28 13:20:21,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:21,715 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:21,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:21,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 103 proven. 209 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2018-11-28 13:20:21,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:21,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2018-11-28 13:20:21,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:20:21,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:20:21,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:20:21,898 INFO L87 Difference]: Start difference. First operand 139 states and 243 transitions. Second operand 13 states. [2018-11-28 13:20:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:22,252 INFO L93 Difference]: Finished difference Result 278 states and 563 transitions. [2018-11-28 13:20:22,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 13:20:22,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2018-11-28 13:20:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:22,254 INFO L225 Difference]: With dead ends: 278 [2018-11-28 13:20:22,254 INFO L226 Difference]: Without dead ends: 106 [2018-11-28 13:20:22,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2018-11-28 13:20:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-28 13:20:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 90. [2018-11-28 13:20:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-28 13:20:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2018-11-28 13:20:22,268 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 192 [2018-11-28 13:20:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:22,269 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2018-11-28 13:20:22,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:20:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2018-11-28 13:20:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-28 13:20:22,271 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:22,271 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:22,271 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:22,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1258139068, now seen corresponding path program 1 times [2018-11-28 13:20:22,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:22,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:22,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:22,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:22,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 226 proven. 25 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2018-11-28 13:20:22,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:22,392 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/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 [2018-11-28 13:20:22,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:22,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 240 proven. 71 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-11-28 13:20:22,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:22,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-11-28 13:20:22,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 13:20:22,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 13:20:22,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2018-11-28 13:20:22,589 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand 19 states. [2018-11-28 13:20:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:22,954 INFO L93 Difference]: Finished difference Result 197 states and 281 transitions. [2018-11-28 13:20:22,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-28 13:20:22,954 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2018-11-28 13:20:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:22,955 INFO L225 Difference]: With dead ends: 197 [2018-11-28 13:20:22,955 INFO L226 Difference]: Without dead ends: 113 [2018-11-28 13:20:22,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2018-11-28 13:20:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-28 13:20:22,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2018-11-28 13:20:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-11-28 13:20:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2018-11-28 13:20:22,966 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 141 transitions. Word has length 191 [2018-11-28 13:20:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:22,967 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 141 transitions. [2018-11-28 13:20:22,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 13:20:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 141 transitions. [2018-11-28 13:20:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-28 13:20:22,969 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:22,970 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:22,970 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:22,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:22,970 INFO L82 PathProgramCache]: Analyzing trace with hash 530478406, now seen corresponding path program 2 times [2018-11-28 13:20:22,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:22,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:22,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:22,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:20:22,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 174 proven. 23 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2018-11-28 13:20:23,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:23,050 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/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 [2018-11-28 13:20:23,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:20:23,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:20:23,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:20:23,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 156 proven. 152 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2018-11-28 13:20:23,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:23,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 15 [2018-11-28 13:20:23,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 13:20:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 13:20:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:20:23,244 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand 15 states. [2018-11-28 13:20:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:23,623 INFO L93 Difference]: Finished difference Result 241 states and 350 transitions. [2018-11-28 13:20:23,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-28 13:20:23,624 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 191 [2018-11-28 13:20:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:23,625 INFO L225 Difference]: With dead ends: 241 [2018-11-28 13:20:23,626 INFO L226 Difference]: Without dead ends: 109 [2018-11-28 13:20:23,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2018-11-28 13:20:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-28 13:20:23,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-11-28 13:20:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-28 13:20:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2018-11-28 13:20:23,639 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 191 [2018-11-28 13:20:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:23,639 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2018-11-28 13:20:23,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 13:20:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2018-11-28 13:20:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-28 13:20:23,642 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:23,642 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:23,642 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:23,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1521046142, now seen corresponding path program 3 times [2018-11-28 13:20:23,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:23,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:23,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:23,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:20:23,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 155 proven. 117 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2018-11-28 13:20:23,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:23,777 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:23,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:20:23,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-11-28 13:20:23,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:20:23,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 571 proven. 21 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-11-28 13:20:23,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:23,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2018-11-28 13:20:23,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 13:20:23,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 13:20:23,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-28 13:20:23,943 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand 14 states. [2018-11-28 13:20:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:24,193 INFO L93 Difference]: Finished difference Result 209 states and 273 transitions. [2018-11-28 13:20:24,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-28 13:20:24,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 190 [2018-11-28 13:20:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:24,195 INFO L225 Difference]: With dead ends: 209 [2018-11-28 13:20:24,195 INFO L226 Difference]: Without dead ends: 95 [2018-11-28 13:20:24,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2018-11-28 13:20:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-28 13:20:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-11-28 13:20:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-11-28 13:20:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2018-11-28 13:20:24,206 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 190 [2018-11-28 13:20:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:24,206 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2018-11-28 13:20:24,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 13:20:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2018-11-28 13:20:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-28 13:20:24,208 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:24,208 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:24,208 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:24,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 4 times [2018-11-28 13:20:24,209 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:24,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:24,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:24,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:20:24,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 124 proven. 31 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-11-28 13:20:24,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:24,322 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:24,337 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:20:24,371 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:20:24,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:20:24,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-11-28 13:20:24,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:24,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 13:20:24,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 13:20:24,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 13:20:24,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-28 13:20:24,439 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 10 states. [2018-11-28 13:20:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:24,537 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2018-11-28 13:20:24,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:20:24,537 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2018-11-28 13:20:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:24,538 INFO L225 Difference]: With dead ends: 115 [2018-11-28 13:20:24,539 INFO L226 Difference]: Without dead ends: 108 [2018-11-28 13:20:24,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-28 13:20:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-11-28 13:20:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2018-11-28 13:20:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-28 13:20:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2018-11-28 13:20:24,545 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 136 [2018-11-28 13:20:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:24,545 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2018-11-28 13:20:24,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 13:20:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2018-11-28 13:20:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-28 13:20:24,546 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:24,547 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:24,547 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:24,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:24,547 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 5 times [2018-11-28 13:20:24,547 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:24,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:24,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:24,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:20:24,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-28 13:20:24,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:24,965 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:24,973 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:20:25,010 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-28 13:20:25,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:20:25,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-11-28 13:20:25,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:25,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-11-28 13:20:25,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-28 13:20:25,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-28 13:20:25,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-28 13:20:25,371 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand 36 states. [2018-11-28 13:20:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:25,743 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2018-11-28 13:20:25,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 13:20:25,744 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2018-11-28 13:20:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:25,745 INFO L225 Difference]: With dead ends: 127 [2018-11-28 13:20:25,745 INFO L226 Difference]: Without dead ends: 120 [2018-11-28 13:20:25,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2018-11-28 13:20:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-28 13:20:25,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2018-11-28 13:20:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-11-28 13:20:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2018-11-28 13:20:25,751 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 177 [2018-11-28 13:20:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:25,751 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2018-11-28 13:20:25,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-28 13:20:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2018-11-28 13:20:25,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-28 13:20:25,753 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:20:25,753 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:20:25,753 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:20:25,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:20:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1108945406, now seen corresponding path program 6 times [2018-11-28 13:20:25,753 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:20:25,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:20:25,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:25,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:20:25,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:20:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:20:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 111 proven. 315 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2018-11-28 13:20:25,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:20:25,905 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 13:20:25,915 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:20:25,954 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-28 13:20:25,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:20:25,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:20:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 679 proven. 31 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-11-28 13:20:26,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:20:26,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2018-11-28 13:20:26,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 13:20:26,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 13:20:26,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:20:26,073 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand 20 states. [2018-11-28 13:20:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:20:26,435 INFO L93 Difference]: Finished difference Result 216 states and 284 transitions. [2018-11-28 13:20:26,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 13:20:26,436 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 218 [2018-11-28 13:20:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:20:26,436 INFO L225 Difference]: With dead ends: 216 [2018-11-28 13:20:26,436 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 13:20:26,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2018-11-28 13:20:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 13:20:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 13:20:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 13:20:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 13:20:26,438 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 218 [2018-11-28 13:20:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:20:26,438 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 13:20:26,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 13:20:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 13:20:26,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 13:20:26,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 13:20:26,555 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:20:26,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:20:26,643 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:20:26,654 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:20:26,724 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:20:26,759 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 13:20:27,013 WARN L180 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 22 [2018-11-28 13:20:27,317 WARN L180 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 31 [2018-11-28 13:20:27,319 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 13:20:27,319 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:20:27,319 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:20:27,320 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 13:20:27,320 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 13:20:27,320 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 13:20:27,320 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-11-28 13:20:27,320 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-11-28 13:20:27,320 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-11-28 13:20:27,320 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-11-28 13:20:27,320 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-11-28 13:20:27,320 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-11-28 13:20:27,320 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2018-11-28 13:20:27,321 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-11-28 13:20:27,321 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-11-28 13:20:27,321 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-11-28 13:20:27,321 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (< 1 |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-11-28 13:20:27,321 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-11-28 13:20:27,321 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (<= fibo2_~n |fibo2_#in~n|)) (.cse1 (<= |fibo2_#in~n| fibo2_~n))) (or (and .cse0 (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3) (<= 5 |fibo2_#in~n|) .cse1) (and (<= 1 |fibo2_#t~ret2|) (<= fibo2_~n 2) .cse0 (<= |fibo2_#t~ret2| 1) (<= 2 fibo2_~n) .cse1) (and .cse0 .cse1 (<= 6 |fibo2_#in~n|)))) [2018-11-28 13:20:27,321 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-11-28 13:20:27,321 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-11-28 13:20:27,321 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-11-28 13:20:27,321 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-11-28 13:20:27,321 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-11-28 13:20:27,322 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-11-28 13:20:27,322 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2018-11-28 13:20:27,322 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-28 13:20:27,322 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 3)))) (and (<= fibo1_~n |fibo1_#in~n|) (or (<= 5 |fibo1_#in~n|) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2)) .cse0) (or (<= 7 |fibo1_#in~n|) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|)) (<= |fibo1_#in~n| 5)) (or .cse0 (<= 4 fibo1_~n)) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n))) [2018-11-28 13:20:27,322 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-11-28 13:20:27,322 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-11-28 13:20:27,322 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-11-28 13:20:27,322 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-11-28 13:20:27,322 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-11-28 13:20:27,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:20:27 BoogieIcfgContainer [2018-11-28 13:20:27,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:20:27,326 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:20:27,326 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:20:27,326 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:20:27,326 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:20:17" (3/4) ... [2018-11-28 13:20:27,330 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 13:20:27,336 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 13:20:27,336 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 13:20:27,337 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-11-28 13:20:27,337 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-11-28 13:20:27,340 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 13:20:27,341 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 13:20:27,341 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 13:20:27,376 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d22d49c6-757a-4e7b-b8b4-1478a8ba9dc4/bin-2019/uautomizer/witness.graphml [2018-11-28 13:20:27,377 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:20:27,377 INFO L168 Benchmark]: Toolchain (without parser) took 9905.79 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 274.2 MB). Free memory was 953.3 MB in the beginning and 1.2 GB in the end (delta: -211.5 MB). Peak memory consumption was 62.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:20:27,378 INFO L168 Benchmark]: CDTParser took 0.14 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. [2018-11-28 13:20:27,378 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.39 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: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-28 13:20:27,379 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.69 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. [2018-11-28 13:20:27,379 INFO L168 Benchmark]: Boogie Preprocessor took 12.66 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. [2018-11-28 13:20:27,380 INFO L168 Benchmark]: RCFGBuilder took 190.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -153.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. [2018-11-28 13:20:27,380 INFO L168 Benchmark]: TraceAbstraction took 9487.36 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 164.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -69.1 MB). Peak memory consumption was 438.6 MB. Max. memory is 11.5 GB. [2018-11-28 13:20:27,380 INFO L168 Benchmark]: Witness Printer took 51.02 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:20:27,383 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 147.39 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: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.69 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 12.66 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 190.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.6 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -153.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9487.36 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 164.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -69.1 MB). Peak memory consumption was 438.6 MB. Max. memory is 11.5 GB. * Witness Printer took 51.02 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 9.4s OverallTime, 16 OverallIterations, 17 TraceHistogramMax, 4.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 511 SDtfs, 611 SDslu, 4376 SDs, 0 SdLazy, 4253 SolverSat, 596 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2018 GetRequests, 1694 SyntacticMatches, 16 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 112 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 452 PreInvPairs, 769 NumberOfFragments, 141 HoareAnnotationTreeSize, 452 FomulaSimplifications, 12577 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 11 FomulaSimplificationsInter, 2799 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 3445 NumberOfCodeBlocks, 3271 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 3415 ConstructedInterpolants, 0 QuantifiedInterpolants, 946761 SizeOfPredicates, 65 NumberOfNonLiveVariables, 3406 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 11768/13944 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...