./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05dc78db4ae9adf9f9f4e8e18548ea9c0db83e87 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 13:02:21,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 13:02:21,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 13:02:21,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 13:02:21,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 13:02:21,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 13:02:21,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 13:02:21,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 13:02:21,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 13:02:21,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 13:02:21,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 13:02:21,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 13:02:21,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 13:02:21,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 13:02:21,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 13:02:21,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 13:02:21,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 13:02:21,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 13:02:21,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 13:02:21,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 13:02:21,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 13:02:21,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 13:02:21,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 13:02:21,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 13:02:21,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 13:02:21,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 13:02:21,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 13:02:21,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 13:02:21,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 13:02:21,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 13:02:21,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 13:02:21,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 13:02:21,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 13:02:21,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 13:02:21,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 13:02:21,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 13:02:21,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 13:02:21,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 13:02:21,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 13:02:21,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 13:02:21,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 13:02:21,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 13:02:21,271 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 13:02:21,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 13:02:21,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 13:02:21,272 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 13:02:21,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 13:02:21,272 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 13:02:21,272 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 13:02:21,273 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 13:02:21,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 13:02:21,273 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 13:02:21,273 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 13:02:21,273 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 13:02:21,273 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 13:02:21,274 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 13:02:21,274 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 13:02:21,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 13:02:21,274 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 13:02:21,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 13:02:21,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 13:02:21,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 13:02:21,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 13:02:21,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 13:02:21,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 13:02:21,275 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 13:02:21,275 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 13:02:21,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 13:02:21,275 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 13:02:21,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 13:02:21,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 13:02:21,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 13:02:21,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 13:02:21,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 13:02:21,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 13:02:21,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 13:02:21,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 13:02:21,276 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 13:02:21,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 13:02:21,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 13:02:21,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 13:02:21,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 13:02:21,277 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan 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 -> Taipan 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 -> 05dc78db4ae9adf9f9f4e8e18548ea9c0db83e87 [2019-12-07 13:02:21,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 13:02:21,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 13:02:21,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 13:02:21,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 13:02:21,419 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 13:02:21,420 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2019-12-07 13:02:21,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/data/02533b038/68523c890bbd4c42b39ee1c72f0bcb63/FLAGf73c7d3b2 [2019-12-07 13:02:21,878 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 13:02:21,879 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2019-12-07 13:02:21,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/data/02533b038/68523c890bbd4c42b39ee1c72f0bcb63/FLAGf73c7d3b2 [2019-12-07 13:02:22,247 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/data/02533b038/68523c890bbd4c42b39ee1c72f0bcb63 [2019-12-07 13:02:22,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 13:02:22,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 13:02:22,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 13:02:22,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 13:02:22,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 13:02:22,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d852d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22, skipping insertion in model container [2019-12-07 13:02:22,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 13:02:22,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 13:02:22,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:02:22,386 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 13:02:22,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 13:02:22,436 INFO L208 MainTranslator]: Completed translation [2019-12-07 13:02:22,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22 WrapperNode [2019-12-07 13:02:22,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 13:02:22,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 13:02:22,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 13:02:22,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 13:02:22,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 13:02:22,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 13:02:22,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 13:02:22,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 13:02:22,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... [2019-12-07 13:02:22,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 13:02:22,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 13:02:22,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 13:02:22,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 13:02:22,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/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 [2019-12-07 13:02:22,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 13:02:22,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 13:02:22,511 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-12-07 13:02:22,511 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-12-07 13:02:22,511 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-12-07 13:02:22,511 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-12-07 13:02:22,639 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 13:02:22,639 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 13:02:22,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:02:22 BoogieIcfgContainer [2019-12-07 13:02:22,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 13:02:22,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 13:02:22,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 13:02:22,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 13:02:22,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:02:22" (1/3) ... [2019-12-07 13:02:22,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110b26b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:02:22, skipping insertion in model container [2019-12-07 13:02:22,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:02:22" (2/3) ... [2019-12-07 13:02:22,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110b26b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:02:22, skipping insertion in model container [2019-12-07 13:02:22,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:02:22" (3/3) ... [2019-12-07 13:02:22,647 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2019-12-07 13:02:22,653 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 13:02:22,657 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 13:02:22,664 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 13:02:22,678 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 13:02:22,678 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 13:02:22,679 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 13:02:22,679 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 13:02:22,679 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 13:02:22,679 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 13:02:22,679 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 13:02:22,679 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 13:02:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-12-07 13:02:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 13:02:22,693 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:22,693 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:22,694 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:22,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-12-07 13:02:22,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:02:22,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319873205] [2019-12-07 13:02:22,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:02:22,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319873205] [2019-12-07 13:02:22,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:02:22,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:02:22,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527643682] [2019-12-07 13:02:22,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:02:22,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:02:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:02:22,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:02:22,824 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2019-12-07 13:02:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:22,880 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2019-12-07 13:02:22,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:02:22,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 13:02:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:22,888 INFO L225 Difference]: With dead ends: 34 [2019-12-07 13:02:22,888 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 13:02:22,890 INFO L630 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 [2019-12-07 13:02:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 13:02:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 13:02:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 13:02:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 13:02:22,920 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-12-07 13:02:22,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:22,920 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 13:02:22,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:02:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 13:02:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 13:02:22,921 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:22,921 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:22,921 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:22,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-12-07 13:02:22,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:02:22,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328701321] [2019-12-07 13:02:22,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:02:22,946 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328701321] [2019-12-07 13:02:22,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:02:22,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 13:02:22,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555582102] [2019-12-07 13:02:22,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 13:02:22,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:02:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 13:02:22,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 13:02:22,949 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-12-07 13:02:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:22,986 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-12-07 13:02:22,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 13:02:22,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 13:02:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:22,987 INFO L225 Difference]: With dead ends: 32 [2019-12-07 13:02:22,987 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 13:02:22,988 INFO L630 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 [2019-12-07 13:02:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 13:02:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-12-07 13:02:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 13:02:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 13:02:22,993 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-12-07 13:02:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:22,993 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 13:02:22,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 13:02:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 13:02:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 13:02:22,994 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:22,994 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:22,995 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-12-07 13:02:22,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:02:22,995 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631429598] [2019-12-07 13:02:22,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:02:23,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631429598] [2019-12-07 13:02:23,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593023926] [2019-12-07 13:02:23,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/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 [2019-12-07 13:02:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:23,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 13:02:23,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:02:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 13:02:23,095 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:02:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:02:23,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-12-07 13:02:23,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 7 [2019-12-07 13:02:23,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538047985] [2019-12-07 13:02:23,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 13:02:23,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:02:23,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 13:02:23,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:02:23,160 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 6 states. [2019-12-07 13:02:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:23,200 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2019-12-07 13:02:23,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 13:02:23,201 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-12-07 13:02:23,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:23,202 INFO L225 Difference]: With dead ends: 54 [2019-12-07 13:02:23,202 INFO L226 Difference]: Without dead ends: 30 [2019-12-07 13:02:23,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 13:02:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-07 13:02:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-12-07 13:02:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 13:02:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-12-07 13:02:23,207 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 22 [2019-12-07 13:02:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:23,207 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-12-07 13:02:23,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 13:02:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-12-07 13:02:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 13:02:23,209 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:23,209 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:23,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:02:23,410 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:23,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-12-07 13:02:23,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:02:23,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196071628] [2019-12-07 13:02:23,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 13:02:23,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196071628] [2019-12-07 13:02:23,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4974607] [2019-12-07 13:02:23,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/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 [2019-12-07 13:02:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:23,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 13:02:23,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:02:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 13:02:23,720 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:02:23,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 13:02:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 13:02:23,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363358136] [2019-12-07 13:02:23,806 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-12-07 13:02:23,806 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:02:23,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 13:02:23,814 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 13:02:23,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 13:02:23,953 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 3 for LOIs [2019-12-07 13:02:24,036 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 16 for LOIs [2019-12-07 13:02:24,053 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 13:02:24,473 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 13:02:24,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:02:24,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2019-12-07 13:02:24,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711591510] [2019-12-07 13:02:24,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 13:02:24,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:02:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 13:02:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2019-12-07 13:02:24,475 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 10 states. [2019-12-07 13:02:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:24,505 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2019-12-07 13:02:24,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 13:02:24,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-12-07 13:02:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:24,507 INFO L225 Difference]: With dead ends: 42 [2019-12-07 13:02:24,508 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 13:02:24,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2019-12-07 13:02:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 13:02:24,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-12-07 13:02:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 13:02:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2019-12-07 13:02:24,516 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2019-12-07 13:02:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:24,516 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2019-12-07 13:02:24,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 13:02:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2019-12-07 13:02:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 13:02:24,518 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:24,518 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:24,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:02:24,719 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1239842987, now seen corresponding path program 1 times [2019-12-07 13:02:24,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:02:24,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434102531] [2019-12-07 13:02:24,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 13:02:24,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434102531] [2019-12-07 13:02:24,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 13:02:24,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 13:02:24,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139882236] [2019-12-07 13:02:24,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 13:02:24,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:02:24,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 13:02:24,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 13:02:24,843 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 7 states. [2019-12-07 13:02:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:24,939 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2019-12-07 13:02:24,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 13:02:24,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-12-07 13:02:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:24,941 INFO L225 Difference]: With dead ends: 40 [2019-12-07 13:02:24,941 INFO L226 Difference]: Without dead ends: 36 [2019-12-07 13:02:24,941 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-12-07 13:02:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-07 13:02:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-12-07 13:02:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 13:02:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2019-12-07 13:02:24,946 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 24 [2019-12-07 13:02:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:24,946 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2019-12-07 13:02:24,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 13:02:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2019-12-07 13:02:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 13:02:24,947 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 13:02:24,947 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 13:02:24,948 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 13:02:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 13:02:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-12-07 13:02:24,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 13:02:24,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649115231] [2019-12-07 13:02:24,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 13:02:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 13:02:25,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649115231] [2019-12-07 13:02:25,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367013558] [2019-12-07 13:02:25,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/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 [2019-12-07 13:02:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 13:02:25,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 13:02:25,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 13:02:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 13:02:25,098 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 13:02:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 13:02:25,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946274307] [2019-12-07 13:02:25,226 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2019-12-07 13:02:25,226 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 13:02:25,227 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-12-07 13:02:25,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 13:02:25,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 19 [2019-12-07 13:02:25,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857762341] [2019-12-07 13:02:25,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 13:02:25,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 13:02:25,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 13:02:25,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2019-12-07 13:02:25,229 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 19 states. [2019-12-07 13:02:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 13:02:25,425 INFO L93 Difference]: Finished difference Result 81 states and 133 transitions. [2019-12-07 13:02:25,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 13:02:25,426 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2019-12-07 13:02:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 13:02:25,426 INFO L225 Difference]: With dead ends: 81 [2019-12-07 13:02:25,426 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 13:02:25,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2019-12-07 13:02:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 13:02:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 13:02:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 13:02:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 13:02:25,429 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2019-12-07 13:02:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 13:02:25,429 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 13:02:25,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 13:02:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 13:02:25,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 13:02:25,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 13:02:25,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 13:02:25,746 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 13:02:25,746 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 13:02:25,746 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-12-07 13:02:25,746 INFO L246 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2019-12-07 13:02:25,747 INFO L246 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-12-07 13:02:25,747 INFO L242 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2) (<= 2 ULTIMATE.start_main_~x~0)) [2019-12-07 13:02:25,747 INFO L246 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-12-07 13:02:25,747 INFO L242 CegarLoopResult]: At program point L38-2(lines 38 40) the Hoare annotation is: (<= 2 ULTIMATE.start_main_~x~0) [2019-12-07 13:02:25,747 INFO L249 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-12-07 13:02:25,747 INFO L242 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2019-12-07 13:02:25,747 INFO L246 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-12-07 13:02:25,748 INFO L242 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2019-12-07 13:02:25,748 INFO L246 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-12-07 13:02:25,748 INFO L246 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-12-07 13:02:25,748 INFO L246 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-12-07 13:02:25,748 INFO L246 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-12-07 13:02:25,748 INFO L246 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-12-07 13:02:25,748 INFO L249 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-12-07 13:02:25,748 INFO L242 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (< 1 fibo1_~n) (<= |fibo1_#in~n| fibo1_~n)) [2019-12-07 13:02:25,748 INFO L246 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-12-07 13:02:25,749 INFO L242 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|)) (.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and .cse0 (<= 3 |fibo1_#in~n|) .cse1) (and .cse0 (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse1))) [2019-12-07 13:02:25,749 INFO L246 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-12-07 13:02:25,749 INFO L246 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-12-07 13:02:25,749 INFO L246 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-12-07 13:02:25,749 INFO L246 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-12-07 13:02:25,749 INFO L246 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-12-07 13:02:25,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 01:02:25 BoogieIcfgContainer [2019-12-07 13:02:25,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 13:02:25,760 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 13:02:25,760 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 13:02:25,760 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 13:02:25,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:02:22" (3/4) ... [2019-12-07 13:02:25,762 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 13:02:25,766 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-12-07 13:02:25,766 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-12-07 13:02:25,769 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-12-07 13:02:25,770 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 13:02:25,770 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 13:02:25,803 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_263da819-c216-4632-91a9-4d16022d5bc1/bin/utaipan/witness.graphml [2019-12-07 13:02:25,803 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 13:02:25,805 INFO L168 Benchmark]: Toolchain (without parser) took 3553.72 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 76.5 MB). Free memory was 939.4 MB in the beginning and 871.8 MB in the end (delta: 67.6 MB). Peak memory consumption was 144.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:02:25,805 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:02:25,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 76.5 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -134.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 13:02:25,806 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 13:02:25,806 INFO L168 Benchmark]: Boogie Preprocessor took 12.15 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:02:25,806 INFO L168 Benchmark]: RCFGBuilder took 171.63 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-12-07 13:02:25,807 INFO L168 Benchmark]: TraceAbstraction took 3118.10 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 873.5 MB in the end (delta: 180.0 MB). Peak memory consumption was 180.0 MB. Max. memory is 11.5 GB. [2019-12-07 13:02:25,807 INFO L168 Benchmark]: Witness Printer took 43.34 ms. Allocated memory is still 1.1 GB. Free memory was 873.5 MB in the beginning and 871.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-12-07 13:02:25,809 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 184.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 76.5 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -134.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.15 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 171.63 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3118.10 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 873.5 MB in the end (delta: 180.0 MB). Peak memory consumption was 180.0 MB. Max. memory is 11.5 GB. * Witness Printer took 43.34 ms. Allocated memory is still 1.1 GB. Free memory was 873.5 MB in the beginning and 871.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 2 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Result: SAFE, OverallTime: 2.9s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 154 SDtfs, 105 SDslu, 603 SDs, 0 SdLazy, 494 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 237 GetRequests, 154 SyntacticMatches, 19 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, 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, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 53 PreInvPairs, 74 NumberOfFragments, 69 HoareAnnotationTreeSize, 53 FomulaSimplifications, 68 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 58 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 203 NumberOfCodeBlocks, 203 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 271 ConstructedInterpolants, 0 QuantifiedInterpolants, 18725 SizeOfPredicates, 7 NumberOfNonLiveVariables, 184 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 45/77 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...