./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/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 0f8f22ce4f3bf9068fc0240f174785871ced813b ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 02:56:26,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:56:26,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:56:26,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:56:26,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:56:26,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:56:26,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:56:26,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:56:26,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:56:26,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:56:26,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:56:26,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:56:26,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:56:26,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:56:26,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:56:26,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:56:26,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:56:26,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:56:26,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:56:26,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:56:26,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:56:26,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:56:26,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:56:26,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:56:26,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:56:26,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:56:26,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:56:26,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:56:26,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:56:26,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:56:26,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:56:26,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:56:26,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:56:26,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:56:26,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:56:26,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:56:26,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:56:26,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:56:26,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:56:26,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:56:26,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:56:26,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 02:56:26,284 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:56:26,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:56:26,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:56:26,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:56:26,286 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:56:26,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:56:26,286 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 02:56:26,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 02:56:26,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 02:56:26,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:56:26,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 02:56:26,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 02:56:26,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 02:56:26,288 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 02:56:26,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 02:56:26,288 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:56:26,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 02:56:26,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:56:26,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:56:26,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 02:56:26,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 02:56:26,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 02:56:26,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:56:26,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 02:56:26,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 02:56:26,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 02:56:26,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 02:56:26,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 02:56:26,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/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 -> 0f8f22ce4f3bf9068fc0240f174785871ced813b [2019-11-20 02:56:26,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:56:26,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:56:26,453 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:56:26,454 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:56:26,455 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:56:26,455 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci01-1.c [2019-11-20 02:56:26,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/data/00069bb52/b944c0310543466c8ed5cdc596ec0ff0/FLAG724bedb43 [2019-11-20 02:56:26,864 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:56:26,864 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/sv-benchmarks/c/recursive/Fibonacci01-1.c [2019-11-20 02:56:26,868 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/data/00069bb52/b944c0310543466c8ed5cdc596ec0ff0/FLAG724bedb43 [2019-11-20 02:56:27,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/data/00069bb52/b944c0310543466c8ed5cdc596ec0ff0 [2019-11-20 02:56:27,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:56:27,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 02:56:27,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:56:27,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:56:27,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:56:27,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ab9a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27, skipping insertion in model container [2019-11-20 02:56:27,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,259 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:56:27,278 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:56:27,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:56:27,451 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:56:27,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:56:27,578 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:56:27,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27 WrapperNode [2019-11-20 02:56:27,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:56:27,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 02:56:27,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 02:56:27,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 02:56:27,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 02:56:27,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:56:27,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:56:27,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:56:27,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... [2019-11-20 02:56:27,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:56:27,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:56:27,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:56:27,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:56:27,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/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 [2019-11-20 02:56:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-11-20 02:56:27,692 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-11-20 02:56:27,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:56:27,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:56:27,883 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:56:27,883 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 02:56:27,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:56:27 BoogieIcfgContainer [2019-11-20 02:56:27,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:56:27,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 02:56:27,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 02:56:27,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 02:56:27,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:56:27" (1/3) ... [2019-11-20 02:56:27,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff28f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:56:27, skipping insertion in model container [2019-11-20 02:56:27,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:56:27" (2/3) ... [2019-11-20 02:56:27,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff28f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:56:27, skipping insertion in model container [2019-11-20 02:56:27,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:56:27" (3/3) ... [2019-11-20 02:56:27,894 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2019-11-20 02:56:27,904 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 02:56:27,911 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 02:56:27,933 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 02:56:27,970 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 02:56:27,970 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 02:56:27,970 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 02:56:27,971 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:56:27,972 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:56:27,973 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 02:56:27,973 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:56:27,974 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 02:56:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-20 02:56:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 02:56:28,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:28,009 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:28,009 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash -337677157, now seen corresponding path program 1 times [2019-11-20 02:56:28,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:28,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011316037] [2019-11-20 02:56:28,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:28,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:56:28,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011316037] [2019-11-20 02:56:28,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:56:28,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 02:56:28,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182989373] [2019-11-20 02:56:28,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 02:56:28,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 02:56:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 02:56:28,396 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2019-11-20 02:56:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:28,571 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2019-11-20 02:56:28,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 02:56:28,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-20 02:56:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:28,585 INFO L225 Difference]: With dead ends: 31 [2019-11-20 02:56:28,585 INFO L226 Difference]: Without dead ends: 18 [2019-11-20 02:56:28,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 02:56:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-20 02:56:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-20 02:56:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-20 02:56:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-20 02:56:28,634 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2019-11-20 02:56:28,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:28,634 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-20 02:56:28,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 02:56:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-20 02:56:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 02:56:28,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:28,637 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:28,637 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash -461887010, now seen corresponding path program 1 times [2019-11-20 02:56:28,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:28,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869687101] [2019-11-20 02:56:28,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 02:56:28,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869687101] [2019-11-20 02:56:28,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102971004] [2019-11-20 02:56:28,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:28,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 02:56:28,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:56:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-20 02:56:28,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:56:28,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-11-20 02:56:28,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49399191] [2019-11-20 02:56:28,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 02:56:28,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:28,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 02:56:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 02:56:28,880 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2019-11-20 02:56:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:29,016 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2019-11-20 02:56:29,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 02:56:29,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-20 02:56:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:29,018 INFO L225 Difference]: With dead ends: 35 [2019-11-20 02:56:29,018 INFO L226 Difference]: Without dead ends: 20 [2019-11-20 02:56:29,019 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:56:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-20 02:56:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-20 02:56:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 02:56:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-20 02:56:29,029 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2019-11-20 02:56:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:29,030 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-20 02:56:29,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 02:56:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-20 02:56:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 02:56:29,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:29,037 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:29,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:29,241 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1032875874, now seen corresponding path program 1 times [2019-11-20 02:56:29,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:29,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306591067] [2019-11-20 02:56:29,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 02:56:29,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306591067] [2019-11-20 02:56:29,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085582195] [2019-11-20 02:56:29,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:29,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 02:56:29,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:56:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 02:56:29,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:56:29,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2019-11-20 02:56:29,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288610430] [2019-11-20 02:56:29,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 02:56:29,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:29,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 02:56:29,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-11-20 02:56:29,656 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 17 states. [2019-11-20 02:56:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:29,972 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2019-11-20 02:56:29,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 02:56:29,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-11-20 02:56:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:29,976 INFO L225 Difference]: With dead ends: 30 [2019-11-20 02:56:29,976 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 02:56:29,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2019-11-20 02:56:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 02:56:29,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-20 02:56:29,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 02:56:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2019-11-20 02:56:29,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2019-11-20 02:56:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:29,990 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2019-11-20 02:56:29,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 02:56:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2019-11-20 02:56:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 02:56:29,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:29,994 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:30,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:30,210 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash 498258551, now seen corresponding path program 2 times [2019-11-20 02:56:30,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:30,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690594729] [2019-11-20 02:56:30,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 02:56:30,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690594729] [2019-11-20 02:56:30,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884453317] [2019-11-20 02:56:30,424 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:30,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:56:30,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:56:30,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:56:30,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:56:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-20 02:56:30,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:56:30,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2019-11-20 02:56:30,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608337031] [2019-11-20 02:56:30,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 02:56:30,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:30,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 02:56:30,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-20 02:56:30,536 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 13 states. [2019-11-20 02:56:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:30,691 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2019-11-20 02:56:30,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 02:56:30,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2019-11-20 02:56:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:30,693 INFO L225 Difference]: With dead ends: 50 [2019-11-20 02:56:30,693 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 02:56:30,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-11-20 02:56:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 02:56:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-20 02:56:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 02:56:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2019-11-20 02:56:30,703 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 37 [2019-11-20 02:56:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:30,703 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2019-11-20 02:56:30,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 02:56:30,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2019-11-20 02:56:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 02:56:30,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:56:30,708 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:56:30,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:30,909 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:56:30,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:56:30,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2107265955, now seen corresponding path program 3 times [2019-11-20 02:56:30,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:56:30,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349386158] [2019-11-20 02:56:30,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:56:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:56:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 02:56:31,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349386158] [2019-11-20 02:56:31,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205389776] [2019-11-20 02:56:31,122 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:31,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 02:56:31,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:56:31,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 02:56:31,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:56:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-20 02:56:31,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:56:31,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2019-11-20 02:56:31,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534005379] [2019-11-20 02:56:31,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 02:56:31,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:56:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 02:56:31,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-20 02:56:31,387 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 21 states. [2019-11-20 02:56:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:56:31,859 INFO L93 Difference]: Finished difference Result 39 states and 61 transitions. [2019-11-20 02:56:31,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 02:56:31,859 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2019-11-20 02:56:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:56:31,860 INFO L225 Difference]: With dead ends: 39 [2019-11-20 02:56:31,860 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 02:56:31,861 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2019-11-20 02:56:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 02:56:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 02:56:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 02:56:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 02:56:31,862 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2019-11-20 02:56:31,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:56:31,862 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:56:31,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 02:56:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 02:56:31,863 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 02:56:32,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:56:32,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 02:56:32,178 INFO L444 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2019-11-20 02:56:32,179 INFO L447 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2019-11-20 02:56:32,179 INFO L440 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2019-11-20 02:56:32,179 INFO L444 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-11-20 02:56:32,179 INFO L440 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (< 1 fibonacci_~n) (<= fibonacci_~n (+ |fibonacci_#t~ret0| 1)) .cse0) (and (<= 3 fibonacci_~n) .cse0 (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2))))) [2019-11-20 02:56:32,179 INFO L444 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2019-11-20 02:56:32,180 INFO L444 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2019-11-20 02:56:32,180 INFO L444 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2019-11-20 02:56:32,180 INFO L444 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2019-11-20 02:56:32,180 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 02:56:32,180 INFO L444 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2019-11-20 02:56:32,180 INFO L447 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2019-11-20 02:56:32,180 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 02:56:32,180 INFO L444 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2019-11-20 02:56:32,180 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 02:56:32,181 INFO L444 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2019-11-20 02:56:32,181 INFO L447 ceAbstractionStarter]: At program point L25(lines 25 36) the Hoare annotation is: true [2019-11-20 02:56:32,181 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2019-11-20 02:56:32,181 INFO L444 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2019-11-20 02:56:32,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 02:56:32 BoogieIcfgContainer [2019-11-20 02:56:32,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 02:56:32,195 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 02:56:32,195 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 02:56:32,196 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 02:56:32,196 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:56:27" (3/4) ... [2019-11-20 02:56:32,199 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 02:56:32,214 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2019-11-20 02:56:32,218 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 02:56:32,218 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 02:56:32,272 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cb38a493-e875-4fc7-a1a0-fa4103b54af4/bin/uautomizer/witness.graphml [2019-11-20 02:56:32,272 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 02:56:32,274 INFO L168 Benchmark]: Toolchain (without parser) took 5031.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 211.8 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -226.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:56:32,277 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:56:32,278 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -192.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:32,283 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:56:32,284 INFO L168 Benchmark]: Boogie Preprocessor took 15.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:56:32,284 INFO L168 Benchmark]: RCFGBuilder took 247.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:32,284 INFO L168 Benchmark]: TraceAbstraction took 4309.32 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -51.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:32,285 INFO L168 Benchmark]: Witness Printer took 76.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:56:32,286 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 346.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -192.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 247.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4309.32 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -51.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. * Witness Printer took 76.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 4.2s, OverallIterations: 5, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 67 SDtfs, 88 SDslu, 255 SDs, 0 SdLazy, 623 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 219 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 32 PreInvPairs, 49 NumberOfFragments, 35 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 254 NumberOfCodeBlocks, 246 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 20372 SizeOfPredicates, 13 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 175/244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...