./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5_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_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 c7b71b458b3f08f188a62c7539b715f43fd7f97d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 13:11:06,953 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 13:11:06,955 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 13:11:06,963 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 13:11:06,963 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 13:11:06,964 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 13:11:06,965 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 13:11:06,966 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 13:11:06,967 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 13:11:06,968 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 13:11:06,969 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 13:11:06,969 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 13:11:06,969 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 13:11:06,970 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 13:11:06,971 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 13:11:06,971 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 13:11:06,972 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 13:11:06,973 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 13:11:06,975 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 13:11:06,976 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 13:11:06,977 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 13:11:06,978 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 13:11:06,980 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 13:11:06,980 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 13:11:06,980 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 13:11:06,981 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 13:11:06,982 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 13:11:06,982 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 13:11:06,983 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 13:11:06,984 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 13:11:06,984 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 13:11:06,984 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 13:11:06,984 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 13:11:06,985 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 13:11:06,985 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 13:11:06,986 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 13:11:06,986 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 13:11:06,996 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 13:11:06,996 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 13:11:06,996 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 13:11:06,997 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 13:11:06,997 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 13:11:06,997 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 13:11:06,997 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 13:11:06,997 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 13:11:06,998 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 13:11:06,999 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 13:11:06,999 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 13:11:06,999 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 13:11:06,999 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 13:11:06,999 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 13:11:06,999 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 13:11:06,999 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 13:11:06,999 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 13:11:06,999 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 13:11:06,999 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 13:11:07,000 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 13:11:07,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 13:11:07,000 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_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2018-11-28 13:11:07,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 13:11:07,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 13:11:07,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 13:11:07,036 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 13:11:07,036 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 13:11:07,036 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-11-28 13:11:07,075 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/data/ebdbfc934/4db43358816e4632b089588596d80c24/FLAG1aa179366 [2018-11-28 13:11:07,474 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 13:11:07,474 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/sv-benchmarks/c/recursive-simple/fibo_5_true-unreach-call_true-termination.c [2018-11-28 13:11:07,478 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/data/ebdbfc934/4db43358816e4632b089588596d80c24/FLAG1aa179366 [2018-11-28 13:11:07,487 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/data/ebdbfc934/4db43358816e4632b089588596d80c24 [2018-11-28 13:11:07,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 13:11:07,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 13:11:07,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 13:11:07,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 13:11:07,493 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 13:11:07,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58cba772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07, skipping insertion in model container [2018-11-28 13:11:07,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 13:11:07,511 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 13:11:07,610 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:11:07,613 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 13:11:07,621 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 13:11:07,630 INFO L195 MainTranslator]: Completed translation [2018-11-28 13:11:07,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07 WrapperNode [2018-11-28 13:11:07,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 13:11:07,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 13:11:07,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 13:11:07,631 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 13:11:07,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 13:11:07,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 13:11:07,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 13:11:07,645 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 13:11:07,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... [2018-11-28 13:11:07,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 13:11:07,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 13:11:07,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 13:11:07,661 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 13:11:07,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 13:11:07,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 13:11:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 13:11:07,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 13:11:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 13:11:07,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 13:11:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-28 13:11:07,734 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-28 13:11:07,869 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 13:11:07,869 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 13:11:07,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:11:07 BoogieIcfgContainer [2018-11-28 13:11:07,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 13:11:07,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 13:11:07,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 13:11:07,872 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 13:11:07,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 01:11:07" (1/3) ... [2018-11-28 13:11:07,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690adcd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:11:07, skipping insertion in model container [2018-11-28 13:11:07,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 01:11:07" (2/3) ... [2018-11-28 13:11:07,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690adcd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 01:11:07, skipping insertion in model container [2018-11-28 13:11:07,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:11:07" (3/3) ... [2018-11-28 13:11:07,875 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5_true-unreach-call_true-termination.c [2018-11-28 13:11:07,882 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 13:11:07,887 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 13:11:07,900 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 13:11:07,927 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 13:11:07,928 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 13:11:07,928 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 13:11:07,928 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 13:11:07,928 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 13:11:07,928 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 13:11:07,928 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 13:11:07,929 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 13:11:07,929 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 13:11:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-28 13:11:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 13:11:07,951 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:07,952 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:07,954 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:07,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:07,959 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-28 13:11:07,960 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:07,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:08,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:11:08,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:08,103 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 13:11:08,105 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:11:08,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:11:08,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:11:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:11:08,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:11:08,119 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-28 13:11:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:08,184 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-28 13:11:08,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:11:08,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 13:11:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:08,192 INFO L225 Difference]: With dead ends: 35 [2018-11-28 13:11:08,192 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 13:11:08,195 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 13:11:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 13:11:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 13:11:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 13:11:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 13:11:08,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-28 13:11:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:08,225 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 13:11:08,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:11:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 13:11:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 13:11:08,226 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:08,226 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:08,227 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:08,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-28 13:11:08,227 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:08,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:08,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:11:08,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:08,268 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 13:11:08,268 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 13:11:08,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 13:11:08,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 13:11:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 13:11:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 13:11:08,270 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-28 13:11:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:08,337 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-28 13:11:08,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 13:11:08,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 13:11:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:08,338 INFO L225 Difference]: With dead ends: 27 [2018-11-28 13:11:08,339 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 13:11:08,339 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 13:11:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 13:11:08,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 13:11:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 13:11:08,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 13:11:08,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-28 13:11:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:08,345 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 13:11:08,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 13:11:08,345 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 13:11:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 13:11:08,346 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:08,346 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:08,346 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:08,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:08,347 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-28 13:11:08,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:08,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:08,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:11:08,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 13:11:08,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:11:08,443 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:08,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:11:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:08,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:11:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 13:11:08,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:11:08,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 13:11:08,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:11:08,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:11:08,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:11:08,531 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-28 13:11:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:08,624 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-28 13:11:08,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:11:08,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-28 13:11:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:08,626 INFO L225 Difference]: With dead ends: 38 [2018-11-28 13:11:08,626 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 13:11:08,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:11:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 13:11:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 13:11:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 13:11:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-28 13:11:08,631 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-28 13:11:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:08,632 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-28 13:11:08,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:11:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-28 13:11:08,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 13:11:08,633 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:08,633 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:08,633 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:08,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:08,634 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-28 13:11:08,634 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:08,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:08,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:11:08,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 13:11:08,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:11:08,693 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:08,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:11:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:08,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:11:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 13:11:08,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:11:08,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 13:11:08,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 13:11:08,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 13:11:08,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 13:11:08,741 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-28 13:11:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:08,791 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-28 13:11:08,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 13:11:08,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-28 13:11:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:08,792 INFO L225 Difference]: With dead ends: 32 [2018-11-28 13:11:08,793 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 13:11:08,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:11:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 13:11:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 13:11:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 13:11:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-28 13:11:08,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-28 13:11:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:08,801 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-28 13:11:08,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 13:11:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-28 13:11:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 13:11:08,803 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:08,803 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:08,803 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:08,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-28 13:11:08,803 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:08,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:08,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:11:08,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 13:11:08,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:11:08,881 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:08,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:11:08,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:11:08,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:11:08,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:11:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-28 13:11:08,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:11:08,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-28 13:11:08,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:11:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:11:08,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:11:08,962 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-28 13:11:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:09,039 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-28 13:11:09,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:11:09,040 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-28 13:11:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:09,042 INFO L225 Difference]: With dead ends: 40 [2018-11-28 13:11:09,042 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 13:11:09,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:11:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 13:11:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-28 13:11:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 13:11:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-28 13:11:09,052 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-28 13:11:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:09,052 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-28 13:11:09,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:11:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-28 13:11:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 13:11:09,055 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:09,055 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:09,056 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:09,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-28 13:11:09,056 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:09,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:09,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:09,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:11:09,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-28 13:11:09,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:11:09,211 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:09,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 13:11:09,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 13:11:09,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:11:09,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:11:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-28 13:11:09,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:11:09,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 13:11:09,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:11:09,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:11:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:11:09,306 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-28 13:11:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:09,508 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-28 13:11:09,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 13:11:09,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-28 13:11:09,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:09,510 INFO L225 Difference]: With dead ends: 76 [2018-11-28 13:11:09,510 INFO L226 Difference]: Without dead ends: 49 [2018-11-28 13:11:09,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-28 13:11:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-28 13:11:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-28 13:11:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 13:11:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-28 13:11:09,517 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-28 13:11:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:09,518 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-28 13:11:09,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:11:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-28 13:11:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-28 13:11:09,519 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:09,519 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:09,520 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:09,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:09,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2018-11-28 13:11:09,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:09,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:09,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:09,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:11:09,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2018-11-28 13:11:09,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:11:09,584 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:09,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 13:11:09,611 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 13:11:09,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:11:09,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:11:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-11-28 13:11:09,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:11:09,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-11-28 13:11:09,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 13:11:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 13:11:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 13:11:09,654 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-11-28 13:11:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:09,798 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-11-28 13:11:09,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 13:11:09,798 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2018-11-28 13:11:09,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:09,800 INFO L225 Difference]: With dead ends: 52 [2018-11-28 13:11:09,800 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 13:11:09,800 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:11:09,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 13:11:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-28 13:11:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 13:11:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-28 13:11:09,806 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 82 [2018-11-28 13:11:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:09,806 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-28 13:11:09,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 13:11:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-28 13:11:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-28 13:11:09,809 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:09,809 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:09,809 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:09,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1659236261, now seen corresponding path program 5 times [2018-11-28 13:11:09,809 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:09,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:09,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:09,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:11:09,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 129 proven. 106 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2018-11-28 13:11:09,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:11:09,867 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:09,875 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 13:11:09,908 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-28 13:11:09,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:11:09,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:11:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 463 proven. 77 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-28 13:11:09,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:11:09,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2018-11-28 13:11:09,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 13:11:09,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 13:11:09,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-11-28 13:11:09,986 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 11 states. [2018-11-28 13:11:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:10,136 INFO L93 Difference]: Finished difference Result 94 states and 162 transitions. [2018-11-28 13:11:10,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 13:11:10,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 125 [2018-11-28 13:11:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:10,137 INFO L225 Difference]: With dead ends: 94 [2018-11-28 13:11:10,137 INFO L226 Difference]: Without dead ends: 52 [2018-11-28 13:11:10,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2018-11-28 13:11:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-28 13:11:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-28 13:11:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-28 13:11:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2018-11-28 13:11:10,145 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 125 [2018-11-28 13:11:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:10,145 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2018-11-28 13:11:10,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 13:11:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2018-11-28 13:11:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-28 13:11:10,147 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:10,147 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:10,147 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:10,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:10,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 6 times [2018-11-28 13:11:10,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:10,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:10,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:10,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:11:10,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 241 proven. 102 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2018-11-28 13:11:10,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:11:10,251 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:10,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 13:11:10,282 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-11-28 13:11:10,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:11:10,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:11:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 259 proven. 59 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-11-28 13:11:10,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:11:10,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 13:11:10,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 13:11:10,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 13:11:10,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-11-28 13:11:10,330 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 12 states. [2018-11-28 13:11:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:10,429 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2018-11-28 13:11:10,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:11:10,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 136 [2018-11-28 13:11:10,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:10,431 INFO L225 Difference]: With dead ends: 66 [2018-11-28 13:11:10,431 INFO L226 Difference]: Without dead ends: 54 [2018-11-28 13:11:10,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-11-28 13:11:10,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-28 13:11:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2018-11-28 13:11:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-28 13:11:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2018-11-28 13:11:10,437 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 136 [2018-11-28 13:11:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:10,437 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2018-11-28 13:11:10,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 13:11:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2018-11-28 13:11:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 13:11:10,438 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:10,439 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:10,439 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:10,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:10,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 7 times [2018-11-28 13:11:10,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:10,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:10,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:10,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 13:11:10,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-11-28 13:11:10,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:11:10,642 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:10,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:11:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:10,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:11:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-11-28 13:11:10,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:11:10,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2018-11-28 13:11:10,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-28 13:11:10,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-28 13:11:10,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:11:10,856 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 20 states. [2018-11-28 13:11:10,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:10,974 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2018-11-28 13:11:10,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 13:11:10,974 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2018-11-28 13:11:10,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:10,975 INFO L225 Difference]: With dead ends: 65 [2018-11-28 13:11:10,975 INFO L226 Difference]: Without dead ends: 61 [2018-11-28 13:11:10,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-11-28 13:11:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-28 13:11:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2018-11-28 13:11:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-28 13:11:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2018-11-28 13:11:10,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 109 [2018-11-28 13:11:10,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:10,980 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2018-11-28 13:11:10,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-28 13:11:10,980 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2018-11-28 13:11:10,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-28 13:11:10,982 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 13:11:10,982 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 13:11:10,982 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 13:11:10,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 13:11:10,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1037714201, now seen corresponding path program 8 times [2018-11-28 13:11:10,982 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 13:11:10,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 13:11:10,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:10,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 13:11:10,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 13:11:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 13:11:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 139 proven. 323 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2018-11-28 13:11:11,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 13:11:11,126 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/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 13:11:11,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 13:11:11,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 13:11:11,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 13:11:11,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 13:11:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 147 proven. 311 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2018-11-28 13:11:11,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 13:11:11,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2018-11-28 13:11:11,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 13:11:11,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 13:11:11,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-11-28 13:11:11,228 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 13 states. [2018-11-28 13:11:11,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 13:11:11,325 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2018-11-28 13:11:11,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 13:11:11,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 150 [2018-11-28 13:11:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 13:11:11,326 INFO L225 Difference]: With dead ends: 60 [2018-11-28 13:11:11,326 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 13:11:11,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2018-11-28 13:11:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 13:11:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 13:11:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 13:11:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 13:11:11,327 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 150 [2018-11-28 13:11:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 13:11:11,327 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 13:11:11,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 13:11:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 13:11:11,327 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 13:11:11,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 13:11:11,536 WARN L180 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2018-11-28 13:11:11,568 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 13:11:11,568 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:11:11,568 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 13:11:11,569 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 13:11:11,569 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 13:11:11,569 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 13:11:11,569 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-28 13:11:11,569 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-28 13:11:11,569 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-28 13:11:11,569 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= 5 main_~x~0) (<= main_~x~0 5)) [2018-11-28 13:11:11,569 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-28 13:11:11,569 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-28 13:11:11,569 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-28 13:11:11,569 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-28 13:11:11,569 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-28 13:11:11,570 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-28 13:11:11,570 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-28 13:11:11,570 INFO L444 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| fibo_~n) (< 1 fibo_~n)) [2018-11-28 13:11:11,570 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-28 13:11:11,570 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse1 (<= fibo_~n |fibo_#in~n|))) (let ((.cse0 (and .cse1 (<= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3) (<= 1 |fibo_#t~ret0|) (< 1 fibo_~n)))) (and (<= |fibo_#in~n| fibo_~n) (or (<= 6 |fibo_#in~n|) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3)) (<= |fibo_#in~n| 4)) (or (and (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) .cse0 (<= 5 |fibo_#in~n|)) (or (and (<= 4 |fibo_#in~n|) .cse1) .cse0)))) [2018-11-28 13:11:11,570 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-28 13:11:11,570 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-28 13:11:11,570 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-28 13:11:11,570 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-28 13:11:11,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 01:11:11 BoogieIcfgContainer [2018-11-28 13:11:11,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 13:11:11,574 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 13:11:11,574 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 13:11:11,574 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 13:11:11,575 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 01:11:07" (3/4) ... [2018-11-28 13:11:11,577 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 13:11:11,582 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 13:11:11,583 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 13:11:11,583 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-28 13:11:11,586 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 13:11:11,586 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 13:11:11,587 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 13:11:11,622 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_162c5ca0-4f0b-4fff-8022-6f3c2d76bd88/bin-2019/uautomizer/witness.graphml [2018-11-28 13:11:11,622 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 13:11:11,623 INFO L168 Benchmark]: Toolchain (without parser) took 4133.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.3 MB). Free memory was 956.0 MB in the beginning and 862.8 MB in the end (delta: 93.2 MB). Peak memory consumption was 271.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:11:11,623 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:11:11,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.49 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:11:11,624 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.04 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:11:11,624 INFO L168 Benchmark]: Boogie Preprocessor took 15.64 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 13:11:11,624 INFO L168 Benchmark]: RCFGBuilder took 209.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 945.3 MB in the beginning and 1.1 GB in the end (delta: -167.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-11-28 13:11:11,624 INFO L168 Benchmark]: TraceAbstraction took 3703.62 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 51.4 MB). Free memory was 1.1 GB in the beginning and 867.5 MB in the end (delta: 245.7 MB). Peak memory consumption was 297.0 MB. Max. memory is 11.5 GB. [2018-11-28 13:11:11,625 INFO L168 Benchmark]: Witness Printer took 47.63 ms. Allocated memory is still 1.2 GB. Free memory was 867.5 MB in the beginning and 862.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. [2018-11-28 13:11:11,627 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 140.49 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.04 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.64 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 209.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.9 MB). Free memory was 945.3 MB in the beginning and 1.1 GB in the end (delta: -167.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3703.62 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 51.4 MB). Free memory was 1.1 GB in the beginning and 867.5 MB in the end (delta: 245.7 MB). Peak memory consumption was 297.0 MB. Max. memory is 11.5 GB. * Witness Printer took 47.63 ms. Allocated memory is still 1.2 GB. Free memory was 867.5 MB in the beginning and 862.8 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 3.6s OverallTime, 11 OverallIterations, 21 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 236 SDtfs, 209 SDslu, 948 SDs, 0 SdLazy, 887 SolverSat, 233 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 946 GetRequests, 808 SyntacticMatches, 11 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 68 PreInvPairs, 115 NumberOfFragments, 92 HoareAnnotationTreeSize, 68 FomulaSimplifications, 570 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 463 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 1609 NumberOfCodeBlocks, 1487 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1589 ConstructedInterpolants, 0 QuantifiedInterpolants, 330791 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1486 ConjunctsInSsa, 136 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 6808/8460 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...