./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10_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_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 dd317ac0ecdb37853dacea373914a521115465e0 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 12:24:17,879 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:24:17,881 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:24:17,891 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:24:17,891 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:24:17,892 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:24:17,893 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:24:17,895 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:24:17,896 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:24:17,897 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:24:17,897 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:24:17,898 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:24:17,898 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:24:17,899 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:24:17,900 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:24:17,900 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:24:17,901 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:24:17,903 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:24:17,904 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:24:17,906 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:24:17,906 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:24:17,907 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:24:17,909 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:24:17,910 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:24:17,910 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:24:17,911 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:24:17,911 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:24:17,912 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:24:17,913 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:24:17,913 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:24:17,914 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:24:17,914 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:24:17,914 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:24:17,915 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:24:17,915 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:24:17,916 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:24:17,916 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:24:17,928 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:24:17,929 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:24:17,929 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:24:17,930 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:24:17,930 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:24:17,930 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:24:17,930 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:24:17,931 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:24:17,931 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:24:17,931 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:24:17,931 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:24:17,931 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:24:17,931 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:24:17,932 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:24:17,932 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:24:17,932 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:24:17,932 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:24:17,932 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:24:17,932 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:24:17,932 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:24:17,933 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:24:17,933 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:24:17,933 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:24:17,933 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:24:17,933 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:24:17,933 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:24:17,934 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:24:17,934 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:24:17,934 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:24:17,934 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:24:17,934 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_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 -> dd317ac0ecdb37853dacea373914a521115465e0 [2018-11-28 12:24:17,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:24:17,975 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:24:17,978 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:24:17,979 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:24:17,980 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:24:17,980 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-28 12:24:18,029 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/data/6189df1ab/adc23b0fcb47422a9fee06946d89d59c/FLAG58bfc9c98 [2018-11-28 12:24:18,384 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:24:18,384 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/sv-benchmarks/c/recursive-simple/fibo_10_true-unreach-call_true-termination.c [2018-11-28 12:24:18,389 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/data/6189df1ab/adc23b0fcb47422a9fee06946d89d59c/FLAG58bfc9c98 [2018-11-28 12:24:18,799 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/data/6189df1ab/adc23b0fcb47422a9fee06946d89d59c [2018-11-28 12:24:18,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:24:18,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:24:18,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:24:18,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:24:18,807 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:24:18,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:18,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0d5add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18, skipping insertion in model container [2018-11-28 12:24:18,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:18,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:24:18,829 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:24:18,947 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:24:18,950 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:24:18,960 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:24:18,970 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:24:18,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18 WrapperNode [2018-11-28 12:24:18,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:24:18,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:24:18,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:24:18,971 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:24:18,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:18,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:18,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:24:18,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:24:18,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:24:18,991 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:24:19,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:19,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:19,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:19,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:19,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:19,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:19,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... [2018-11-28 12:24:19,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:24:19,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:24:19,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:24:19,010 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:24:19,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:24:19,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:24:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:24:19,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:24:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:24:19,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:24:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2018-11-28 12:24:19,101 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2018-11-28 12:24:19,226 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:24:19,226 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 12:24:19,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:19 BoogieIcfgContainer [2018-11-28 12:24:19,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:24:19,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:24:19,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:24:19,230 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:24:19,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:24:18" (1/3) ... [2018-11-28 12:24:19,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bc8481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:24:19, skipping insertion in model container [2018-11-28 12:24:19,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:18" (2/3) ... [2018-11-28 12:24:19,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bc8481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:24:19, skipping insertion in model container [2018-11-28 12:24:19,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:19" (3/3) ... [2018-11-28 12:24:19,233 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_10_true-unreach-call_true-termination.c [2018-11-28 12:24:19,244 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:24:19,252 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:24:19,270 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:24:19,300 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:24:19,301 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:24:19,301 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:24:19,301 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:24:19,301 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:24:19,302 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:24:19,302 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:24:19,302 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:24:19,302 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:24:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-28 12:24:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 12:24:19,326 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:19,327 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:19,329 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:19,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2018-11-28 12:24:19,337 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:19,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:19,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:19,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:24:19,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:19,504 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 12:24:19,506 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:24:19,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:24:19,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:24:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:24:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:24:19,519 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-28 12:24:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:19,587 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-28 12:24:19,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:24:19,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 12:24:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:19,597 INFO L225 Difference]: With dead ends: 35 [2018-11-28 12:24:19,597 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 12:24:19,600 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 12:24:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 12:24:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 12:24:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 12:24:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 12:24:19,628 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-28 12:24:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:19,628 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 12:24:19,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:24:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 12:24:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 12:24:19,629 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:19,630 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:19,630 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:19,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:19,630 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2018-11-28 12:24:19,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:19,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:19,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:19,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:24:19,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:19,668 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 12:24:19,668 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:24:19,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:24:19,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:24:19,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:24:19,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:24:19,671 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-28 12:24:19,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:19,736 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-28 12:24:19,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:24:19,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 12:24:19,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:19,738 INFO L225 Difference]: With dead ends: 27 [2018-11-28 12:24:19,738 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 12:24:19,739 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 12:24:19,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 12:24:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 12:24:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 12:24:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 12:24:19,744 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-28 12:24:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:19,745 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 12:24:19,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:24:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 12:24:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 12:24:19,746 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:19,746 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 12:24:19,746 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:19,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:19,746 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2018-11-28 12:24:19,746 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:19,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:19,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:19,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:24:19,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:19,824 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 12:24:19,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:19,824 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:19,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:24:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:19,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:19,922 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 12:24:19,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:19,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 12:24:19,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:24:19,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:24:19,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:24:19,943 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-28 12:24:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:20,047 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-28 12:24:20,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 12:24:20,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-28 12:24:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:20,049 INFO L225 Difference]: With dead ends: 38 [2018-11-28 12:24:20,049 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 12:24:20,050 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 12:24:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 12:24:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 12:24:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 12:24:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-28 12:24:20,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-28 12:24:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:20,056 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-28 12:24:20,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:24:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-28 12:24:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 12:24:20,057 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:20,057 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 12:24:20,058 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:20,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2018-11-28 12:24:20,058 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:20,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:20,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:20,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:24:20,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:20,122 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 12:24:20,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:20,122 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:20,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:24:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:20,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:20,158 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 12:24:20,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:20,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 12:24:20,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:24:20,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:24:20,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:24:20,176 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-28 12:24:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:20,225 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-28 12:24:20,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:24:20,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-28 12:24:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:20,226 INFO L225 Difference]: With dead ends: 32 [2018-11-28 12:24:20,227 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 12:24:20,227 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 12:24:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 12:24:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 12:24:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 12:24:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-28 12:24:20,234 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-28 12:24:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:20,234 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-28 12:24:20,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:24:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-28 12:24:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 12:24:20,235 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:20,235 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 12:24:20,236 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:20,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2018-11-28 12:24:20,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:20,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:20,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:20,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:24:20,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:20,293 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 12:24:20,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:20,293 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:20,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:24:20,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:24:20,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:20,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:20,376 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 12:24:20,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:20,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-28 12:24:20,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:24:20,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:24:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:24:20,405 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-28 12:24:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:20,487 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-28 12:24:20,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 12:24:20,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-28 12:24:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:20,488 INFO L225 Difference]: With dead ends: 40 [2018-11-28 12:24:20,488 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 12:24:20,489 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 12:24:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 12:24:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-28 12:24:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 12:24:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-28 12:24:20,495 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-28 12:24:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:20,496 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-28 12:24:20,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:24:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-28 12:24:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 12:24:20,497 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:20,498 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 12:24:20,498 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:20,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:20,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2018-11-28 12:24:20,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:20,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:20,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:20,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:24:20,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:20,637 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 12:24:20,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:20,638 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:20,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:24:20,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 12:24:20,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:20,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:20,717 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 12:24:20,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:20,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 12:24:20,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:24:20,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:24:20,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:24:20,735 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-28 12:24:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:20,959 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-28 12:24:20,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:24:20,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-28 12:24:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:20,961 INFO L225 Difference]: With dead ends: 76 [2018-11-28 12:24:20,961 INFO L226 Difference]: Without dead ends: 49 [2018-11-28 12:24:20,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-28 12:24:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-28 12:24:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-28 12:24:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 12:24:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-28 12:24:20,969 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-28 12:24:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:20,970 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-28 12:24:20,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:24:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-28 12:24:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-28 12:24:20,971 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:20,972 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:20,972 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:20,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2018-11-28 12:24:20,972 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:20,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:20,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:20,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:24:20,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-28 12:24:21,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:21,031 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:21,045 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:24:21,061 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:24:21,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:21,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-28 12:24:21,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:21,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2018-11-28 12:24:21,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:24:21,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:24:21,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:24:21,111 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 8 states. [2018-11-28 12:24:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:21,206 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2018-11-28 12:24:21,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 12:24:21,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2018-11-28 12:24:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:21,208 INFO L225 Difference]: With dead ends: 52 [2018-11-28 12:24:21,208 INFO L226 Difference]: Without dead ends: 48 [2018-11-28 12:24:21,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:24:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-28 12:24:21,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-28 12:24:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-28 12:24:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 77 transitions. [2018-11-28 12:24:21,215 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 77 transitions. Word has length 68 [2018-11-28 12:24:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:21,215 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 77 transitions. [2018-11-28 12:24:21,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:24:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 77 transitions. [2018-11-28 12:24:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-28 12:24:21,217 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:21,217 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 12:24:21,218 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:21,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:21,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2018-11-28 12:24:21,218 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:21,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:21,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:21,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:24:21,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-11-28 12:24:21,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:21,352 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:21,364 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:24:21,397 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-28 12:24:21,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:21,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2018-11-28 12:24:21,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:21,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 14 [2018-11-28 12:24:21,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:24:21,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:24:21,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:24:21,523 INFO L87 Difference]: Start difference. First operand 48 states and 77 transitions. Second operand 14 states. [2018-11-28 12:24:21,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:21,804 INFO L93 Difference]: Finished difference Result 118 states and 229 transitions. [2018-11-28 12:24:21,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-28 12:24:21,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2018-11-28 12:24:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:21,806 INFO L225 Difference]: With dead ends: 118 [2018-11-28 12:24:21,806 INFO L226 Difference]: Without dead ends: 72 [2018-11-28 12:24:21,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2018-11-28 12:24:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-28 12:24:21,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2018-11-28 12:24:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-28 12:24:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2018-11-28 12:24:21,816 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 136 [2018-11-28 12:24:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:21,817 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2018-11-28 12:24:21,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:24:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2018-11-28 12:24:21,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-28 12:24:21,821 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:21,822 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:21,822 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:21,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash -509498553, now seen corresponding path program 6 times [2018-11-28 12:24:21,822 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:21,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:21,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:21,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:24:21,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 669 proven. 122 refuted. 0 times theorem prover too weak. 1450 trivial. 0 not checked. [2018-11-28 12:24:21,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:21,995 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:22,004 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:24:22,045 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-11-28 12:24:22,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:22,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 236 proven. 396 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [2018-11-28 12:24:22,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:22,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2018-11-28 12:24:22,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-28 12:24:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-28 12:24:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:24:22,144 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 18 states. [2018-11-28 12:24:22,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:22,674 INFO L93 Difference]: Finished difference Result 163 states and 256 transitions. [2018-11-28 12:24:22,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-28 12:24:22,675 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 204 [2018-11-28 12:24:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:22,677 INFO L225 Difference]: With dead ends: 163 [2018-11-28 12:24:22,677 INFO L226 Difference]: Without dead ends: 97 [2018-11-28 12:24:22,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=422, Invalid=1470, Unknown=0, NotChecked=0, Total=1892 [2018-11-28 12:24:22,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-28 12:24:22,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2018-11-28 12:24:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-28 12:24:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2018-11-28 12:24:22,688 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 204 [2018-11-28 12:24:22,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:22,688 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2018-11-28 12:24:22,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-28 12:24:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2018-11-28 12:24:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-28 12:24:22,693 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:22,694 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:22,694 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:22,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:22,694 INFO L82 PathProgramCache]: Analyzing trace with hash 223191898, now seen corresponding path program 7 times [2018-11-28 12:24:22,694 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:22,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:22,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:22,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:24:22,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 248 proven. 1232 refuted. 0 times theorem prover too weak. 5640 trivial. 0 not checked. [2018-11-28 12:24:22,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:22,858 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:22,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:24:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:22,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 214 proven. 1491 refuted. 0 times theorem prover too weak. 5415 trivial. 0 not checked. [2018-11-28 12:24:23,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:23,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2018-11-28 12:24:23,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 12:24:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 12:24:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:24:23,092 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand 11 states. [2018-11-28 12:24:23,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:23,223 INFO L93 Difference]: Finished difference Result 99 states and 144 transitions. [2018-11-28 12:24:23,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:24:23,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 354 [2018-11-28 12:24:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:23,226 INFO L225 Difference]: With dead ends: 99 [2018-11-28 12:24:23,226 INFO L226 Difference]: Without dead ends: 95 [2018-11-28 12:24:23,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:24:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-28 12:24:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2018-11-28 12:24:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-28 12:24:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 129 transitions. [2018-11-28 12:24:23,240 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 129 transitions. Word has length 354 [2018-11-28 12:24:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:23,240 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 129 transitions. [2018-11-28 12:24:23,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 12:24:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 129 transitions. [2018-11-28 12:24:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-11-28 12:24:23,252 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:23,252 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:23,253 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:23,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1339067037, now seen corresponding path program 8 times [2018-11-28 12:24:23,254 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:23,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:23,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:23,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:24:23,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 425 proven. 2285 refuted. 0 times theorem prover too weak. 13697 trivial. 0 not checked. [2018-11-28 12:24:23,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:23,508 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:23,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:24:23,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:24:23,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:23,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 386 proven. 2689 refuted. 0 times theorem prover too weak. 13332 trivial. 0 not checked. [2018-11-28 12:24:23,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:23,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2018-11-28 12:24:23,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:24:23,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:24:23,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:24:23,786 INFO L87 Difference]: Start difference. First operand 92 states and 129 transitions. Second operand 12 states. [2018-11-28 12:24:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:23,932 INFO L93 Difference]: Finished difference Result 101 states and 150 transitions. [2018-11-28 12:24:23,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 12:24:23,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 531 [2018-11-28 12:24:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:23,936 INFO L225 Difference]: With dead ends: 101 [2018-11-28 12:24:23,936 INFO L226 Difference]: Without dead ends: 97 [2018-11-28 12:24:23,936 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:24:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-28 12:24:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-11-28 12:24:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-28 12:24:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 144 transitions. [2018-11-28 12:24:23,948 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 144 transitions. Word has length 531 [2018-11-28 12:24:23,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:23,949 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 144 transitions. [2018-11-28 12:24:23,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:24:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 144 transitions. [2018-11-28 12:24:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1063 [2018-11-28 12:24:23,959 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:23,959 INFO L402 BasicCegarLoop]: trace histogram [155, 155, 125, 77, 77, 77, 77, 77, 77, 77, 48, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:23,959 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:23,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:23,960 INFO L82 PathProgramCache]: Analyzing trace with hash -413582866, now seen corresponding path program 9 times [2018-11-28 12:24:23,960 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:23,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:23,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:23,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:24:23,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 853 proven. 5690 refuted. 0 times theorem prover too weak. 60651 trivial. 0 not checked. [2018-11-28 12:24:24,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:24,594 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:24,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:24:24,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-11-28 12:24:24,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:24,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 67194 backedges. 6400 proven. 296 refuted. 0 times theorem prover too weak. 60498 trivial. 0 not checked. [2018-11-28 12:24:25,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:25,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-11-28 12:24:25,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-28 12:24:25,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-28 12:24:25,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-11-28 12:24:25,226 INFO L87 Difference]: Start difference. First operand 97 states and 144 transitions. Second operand 19 states. [2018-11-28 12:24:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:25,880 INFO L93 Difference]: Finished difference Result 239 states and 448 transitions. [2018-11-28 12:24:25,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-28 12:24:25,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1062 [2018-11-28 12:24:25,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:25,883 INFO L225 Difference]: With dead ends: 239 [2018-11-28 12:24:25,883 INFO L226 Difference]: Without dead ends: 151 [2018-11-28 12:24:25,884 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=687, Invalid=2505, Unknown=0, NotChecked=0, Total=3192 [2018-11-28 12:24:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-11-28 12:24:25,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 135. [2018-11-28 12:24:25,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-11-28 12:24:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 190 transitions. [2018-11-28 12:24:25,896 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 190 transitions. Word has length 1062 [2018-11-28 12:24:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:25,897 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 190 transitions. [2018-11-28 12:24:25,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-28 12:24:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 190 transitions. [2018-11-28 12:24:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1567 [2018-11-28 12:24:25,906 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:25,907 INFO L402 BasicCegarLoop]: trace histogram [229, 229, 185, 114, 114, 114, 114, 114, 114, 114, 71, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:25,907 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:25,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash 395085911, now seen corresponding path program 10 times [2018-11-28 12:24:25,907 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:25,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:25,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:25,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:24:25,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 147208 backedges. 6878 proven. 4630 refuted. 0 times theorem prover too weak. 135700 trivial. 0 not checked. [2018-11-28 12:24:26,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:26,881 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:26,891 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:24:27,071 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:24:27,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:27,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 147208 backedges. 6890 proven. 4610 refuted. 0 times theorem prover too weak. 135708 trivial. 0 not checked. [2018-11-28 12:24:27,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:27,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2018-11-28 12:24:27,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-28 12:24:27,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-28 12:24:27,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:24:27,905 INFO L87 Difference]: Start difference. First operand 135 states and 190 transitions. Second operand 17 states. [2018-11-28 12:24:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:28,078 INFO L93 Difference]: Finished difference Result 199 states and 333 transitions. [2018-11-28 12:24:28,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 12:24:28,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1566 [2018-11-28 12:24:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:28,083 INFO L225 Difference]: With dead ends: 199 [2018-11-28 12:24:28,083 INFO L226 Difference]: Without dead ends: 177 [2018-11-28 12:24:28,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1596 GetRequests, 1572 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2018-11-28 12:24:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-28 12:24:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-11-28 12:24:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-11-28 12:24:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2018-11-28 12:24:28,096 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 1566 [2018-11-28 12:24:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:28,098 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2018-11-28 12:24:28,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-28 12:24:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2018-11-28 12:24:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1254 [2018-11-28 12:24:28,107 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:28,107 INFO L402 BasicCegarLoop]: trace histogram [183, 183, 148, 91, 91, 91, 91, 91, 91, 91, 57, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:28,107 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:28,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:28,108 INFO L82 PathProgramCache]: Analyzing trace with hash -987904872, now seen corresponding path program 11 times [2018-11-28 12:24:28,108 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:28,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:28,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:28,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:24:28,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 93870 backedges. 1521 proven. 8541 refuted. 0 times theorem prover too weak. 83808 trivial. 0 not checked. [2018-11-28 12:24:28,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:28,917 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:28,923 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:24:29,392 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 125 check-sat command(s) [2018-11-28 12:24:29,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:29,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 93870 backedges. 21320 proven. 123 refuted. 0 times theorem prover too weak. 72427 trivial. 0 not checked. [2018-11-28 12:24:29,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:29,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 22 [2018-11-28 12:24:29,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-28 12:24:29,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-28 12:24:29,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:24:29,977 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand 22 states. [2018-11-28 12:24:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:30,338 INFO L93 Difference]: Finished difference Result 334 states and 640 transitions. [2018-11-28 12:24:30,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-28 12:24:30,339 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1253 [2018-11-28 12:24:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:30,340 INFO L225 Difference]: With dead ends: 334 [2018-11-28 12:24:30,340 INFO L226 Difference]: Without dead ends: 158 [2018-11-28 12:24:30,341 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1293 GetRequests, 1257 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=1034, Unknown=0, NotChecked=0, Total=1406 [2018-11-28 12:24:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-28 12:24:30,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2018-11-28 12:24:30,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-28 12:24:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2018-11-28 12:24:30,349 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 1253 [2018-11-28 12:24:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:30,350 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2018-11-28 12:24:30,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-28 12:24:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2018-11-28 12:24:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2018-11-28 12:24:30,358 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:24:30,359 INFO L402 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:24:30,359 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:24:30,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:24:30,359 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 12 times [2018-11-28 12:24:30,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:24:30,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:24:30,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:30,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:24:30,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:24:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:24:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-11-28 12:24:32,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:24:32,383 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/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 12:24:32,390 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:24:33,242 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 144 check-sat command(s) [2018-11-28 12:24:33,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:24:33,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:24:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 0 proven. 28921 refuted. 0 times theorem prover too weak. 58848 trivial. 0 not checked. [2018-11-28 12:24:34,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:24:34,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 40 [2018-11-28 12:24:34,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-28 12:24:34,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-28 12:24:34,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 12:24:34,772 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 40 states. [2018-11-28 12:24:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:24:35,062 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2018-11-28 12:24:35,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-28 12:24:35,062 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 1212 [2018-11-28 12:24:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:24:35,063 INFO L225 Difference]: With dead ends: 127 [2018-11-28 12:24:35,063 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 12:24:35,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1440 SyntacticMatches, 90 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2018-11-28 12:24:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 12:24:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 12:24:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 12:24:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 12:24:35,065 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1212 [2018-11-28 12:24:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:24:35,065 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:24:35,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-28 12:24:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 12:24:35,065 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 12:24:35,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 12:24:36,063 WARN L180 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 70 [2018-11-28 12:24:36,192 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 12:24:36,192 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:24:36,192 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:24:36,192 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 12:24:36,192 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 12:24:36,192 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 12:24:36,192 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2018-11-28 12:24:36,192 INFO L448 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-11-28 12:24:36,192 INFO L448 ceAbstractionStarter]: For program point L26(lines 26 28) no Hoare annotation was computed. [2018-11-28 12:24:36,192 INFO L444 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 10) (<= 10 main_~x~0)) [2018-11-28 12:24:36,192 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2018-11-28 12:24:36,193 INFO L448 ceAbstractionStarter]: For program point L25-1(line 25) no Hoare annotation was computed. [2018-11-28 12:24:36,193 INFO L448 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2018-11-28 12:24:36,193 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2018-11-28 12:24:36,193 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2018-11-28 12:24:36,193 INFO L448 ceAbstractionStarter]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2018-11-28 12:24:36,193 INFO L448 ceAbstractionStarter]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2018-11-28 12:24:36,193 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 12:24:36,193 INFO L448 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-28 12:24:36,193 INFO L444 ceAbstractionStarter]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (<= fibo_~n |fibo_#in~n|))) (let ((.cse1 (<= 6 |fibo_#in~n|)) (.cse0 (and .cse2 (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= fibo_~n 5) (<= 5 fibo_~n)))) (and (or (<= 9 |fibo_#in~n|) (< |fibo_#in~n| 8) (and (<= 13 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 13))) (or (and (<= |fibo_#t~ret0| 8) (<= 8 |fibo_#t~ret0|) (<= 7 fibo_~n)) (and (<= 4 |fibo_#in~n|) (<= |fibo_#in~n| 5) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2)) (and (<= |fibo_#t~ret0| 1) (<= |fibo_#in~n| 3) (<= 1 |fibo_#t~ret0|)) (<= 8 |fibo_#in~n|) .cse0 (and (<= |fibo_#t~ret0| 5) (<= |fibo_#in~n| 6) (<= 5 |fibo_#t~ret0|) .cse1)) (or (<= |fibo_#in~n| 9) (<= 11 |fibo_#in~n|) (and (<= 34 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 34))) .cse2 (let ((.cse3 (<= |fibo_#in~n| fibo_~n))) (or (and (<= |fibo_#in~n| 8) .cse3) (and (<= |fibo_#t~ret0| 21) (<= 21 |fibo_#t~ret0|) .cse3) (and (<= 10 |fibo_#in~n|) .cse3))) (< 1 fibo_~n) (or .cse1 (< |fibo_#in~n| 5) .cse0)))) [2018-11-28 12:24:36,193 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 12) no Hoare annotation was computed. [2018-11-28 12:24:36,193 INFO L448 ceAbstractionStarter]: For program point L11-3(line 11) no Hoare annotation was computed. [2018-11-28 12:24:36,194 INFO L448 ceAbstractionStarter]: For program point L6(lines 6 12) no Hoare annotation was computed. [2018-11-28 12:24:36,194 INFO L451 ceAbstractionStarter]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2018-11-28 12:24:36,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:24:36 BoogieIcfgContainer [2018-11-28 12:24:36,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:24:36,196 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:24:36,196 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:24:36,196 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:24:36,196 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:19" (3/4) ... [2018-11-28 12:24:36,199 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 12:24:36,204 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 12:24:36,204 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 12:24:36,204 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2018-11-28 12:24:36,207 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-28 12:24:36,208 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-28 12:24:36,208 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 12:24:36,237 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_68ec0ee8-08c0-4cef-b084-e4fd1e538a5c/bin-2019/uautomizer/witness.graphml [2018-11-28 12:24:36,238 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:24:36,238 INFO L168 Benchmark]: Toolchain (without parser) took 17436.78 ms. Allocated memory was 1.0 GB in the beginning and 3.3 GB in the end (delta: 2.3 GB). Free memory was 953.3 MB in the beginning and 1.8 GB in the end (delta: -804.2 MB). Peak memory consumption was 1.5 GB. Max. memory is 11.5 GB. [2018-11-28 12:24:36,239 INFO L168 Benchmark]: CDTParser took 0.18 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 12:24:36,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.13 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:24:36,239 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.51 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:24:36,240 INFO L168 Benchmark]: Boogie Preprocessor took 18.30 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:24:36,240 INFO L168 Benchmark]: RCFGBuilder took 217.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -178.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:24:36,240 INFO L168 Benchmark]: TraceAbstraction took 16968.11 ms. Allocated memory was 1.2 GB in the beginning and 3.3 GB in the end (delta: 2.2 GB). Free memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: -636.4 MB). Peak memory consumption was 1.5 GB. Max. memory is 11.5 GB. [2018-11-28 12:24:36,240 INFO L168 Benchmark]: Witness Printer took 41.85 ms. Allocated memory is still 3.3 GB. Free memory is still 1.8 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:24:36,242 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 167.13 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.51 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.30 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 217.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 942.6 MB in the beginning and 1.1 GB in the end (delta: -178.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 16968.11 ms. Allocated memory was 1.2 GB in the beginning and 3.3 GB in the end (delta: 2.2 GB). Free memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: -636.4 MB). Peak memory consumption was 1.5 GB. Max. memory is 11.5 GB. * Witness Printer took 41.85 ms. Allocated memory is still 3.3 GB. Free memory is still 1.8 GB. There was no memory consumed. 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, 16.9s OverallTime, 15 OverallIterations, 229 TraceHistogramMax, 3.3s AutomataDifference, 0.0s DeadEndRemovalTime, 1.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 391 SDtfs, 619 SDslu, 2360 SDs, 0 SdLazy, 3406 SolverSat, 785 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7240 GetRequests, 6832 SyntacticMatches, 92 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=177occurred in iteration=13, 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, 15 MinimizatonAttempts, 73 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 296 PreInvPairs, 584 NumberOfFragments, 175 HoareAnnotationTreeSize, 296 FomulaSimplifications, 3579 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 6523 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 13177 NumberOfCodeBlocks, 11823 NumberOfCodeBlocksAsserted, 358 NumberOfCheckSat, 13149 ConstructedInterpolants, 0 QuantifiedInterpolants, 25578539 SizeOfPredicates, 75 NumberOfNonLiveVariables, 11423 ConjunctsInSsa, 860 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 756128/846860 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...