./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e40a98558d0111ea95f3ee60a44cc14c7768182 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 01:26:03,556 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 01:26:03,557 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 01:26:03,565 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 01:26:03,565 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 01:26:03,566 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 01:26:03,567 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 01:26:03,568 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 01:26:03,569 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 01:26:03,570 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 01:26:03,570 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 01:26:03,570 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 01:26:03,571 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 01:26:03,572 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 01:26:03,572 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 01:26:03,573 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 01:26:03,573 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 01:26:03,575 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 01:26:03,577 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 01:26:03,578 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 01:26:03,578 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 01:26:03,579 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 01:26:03,581 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 01:26:03,581 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 01:26:03,581 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 01:26:03,582 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 01:26:03,583 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 01:26:03,583 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 01:26:03,584 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 01:26:03,584 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 01:26:03,585 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 01:26:03,585 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 01:26:03,585 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 01:26:03,585 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 01:26:03,587 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 01:26:03,587 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 01:26:03,587 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 01:26:03,597 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 01:26:03,597 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 01:26:03,598 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 01:26:03,598 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 01:26:03,599 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 01:26:03,599 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 01:26:03,599 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 01:26:03,599 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 01:26:03,599 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 01:26:03,599 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 01:26:03,599 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 01:26:03,600 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 01:26:03,600 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 01:26:03,600 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 01:26:03,600 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 01:26:03,600 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 01:26:03,600 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 01:26:03,600 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 01:26:03,600 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 01:26:03,601 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 01:26:03,601 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 01:26:03,601 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 01:26:03,601 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 01:26:03,601 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 01:26:03,601 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 01:26:03,601 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 01:26:03,601 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 01:26:03,601 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 01:26:03,602 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 01:26:03,602 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 01:26:03,602 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2018-11-23 01:26:03,625 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 01:26:03,634 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 01:26:03,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 01:26:03,638 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 01:26:03,638 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 01:26:03,638 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 01:26:03,682 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/data/3fce3879a/e92e02988471445c948bcbdbbf9503a7/FLAG3a00f3002 [2018-11-23 01:26:04,071 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 01:26:04,071 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/sv-benchmarks/c/recursive/Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 01:26:04,075 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/data/3fce3879a/e92e02988471445c948bcbdbbf9503a7/FLAG3a00f3002 [2018-11-23 01:26:04,086 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/data/3fce3879a/e92e02988471445c948bcbdbbf9503a7 [2018-11-23 01:26:04,088 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 01:26:04,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 01:26:04,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 01:26:04,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 01:26:04,093 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 01:26:04,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e234a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04, skipping insertion in model container [2018-11-23 01:26:04,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 01:26:04,115 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 01:26:04,222 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 01:26:04,224 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 01:26:04,233 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 01:26:04,241 INFO L195 MainTranslator]: Completed translation [2018-11-23 01:26:04,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04 WrapperNode [2018-11-23 01:26:04,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 01:26:04,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 01:26:04,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 01:26:04,242 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 01:26:04,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 01:26:04,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 01:26:04,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 01:26:04,253 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 01:26:04,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... [2018-11-23 01:26:04,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 01:26:04,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 01:26:04,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 01:26:04,263 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 01:26:04,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 01:26:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-23 01:26:04,332 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-23 01:26:04,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 01:26:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 01:26:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 01:26:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 01:26:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 01:26:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 01:26:04,417 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 01:26:04,417 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 01:26:04,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:26:04 BoogieIcfgContainer [2018-11-23 01:26:04,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 01:26:04,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 01:26:04,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 01:26:04,420 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 01:26:04,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:26:04" (1/3) ... [2018-11-23 01:26:04,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735b7c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:26:04, skipping insertion in model container [2018-11-23 01:26:04,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:26:04" (2/3) ... [2018-11-23 01:26:04,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735b7c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:26:04, skipping insertion in model container [2018-11-23 01:26:04,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:26:04" (3/3) ... [2018-11-23 01:26:04,423 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci02_true-unreach-call_true-no-overflow_true-termination.c [2018-11-23 01:26:04,429 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 01:26:04,434 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 01:26:04,444 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 01:26:04,462 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 01:26:04,462 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 01:26:04,462 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 01:26:04,463 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 01:26:04,463 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 01:26:04,463 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 01:26:04,463 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 01:26:04,463 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 01:26:04,463 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 01:26:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-23 01:26:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-23 01:26:04,482 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:04,482 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:04,484 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:04,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:04,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2018-11-23 01:26:04,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:04,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:04,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:04,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:26:04,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 01:26:04,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 01:26:04,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 01:26:04,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 01:26:04,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 01:26:04,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 01:26:04,613 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-11-23 01:26:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:04,683 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-11-23 01:26:04,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 01:26:04,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-23 01:26:04,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:04,697 INFO L225 Difference]: With dead ends: 33 [2018-11-23 01:26:04,697 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 01:26:04,699 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 01:26:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 01:26:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-23 01:26:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 01:26:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-23 01:26:04,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-23 01:26:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:04,730 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-23 01:26:04,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 01:26:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-23 01:26:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 01:26:04,731 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:04,731 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:04,732 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:04,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:04,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2018-11-23 01:26:04,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:04,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:04,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:04,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:26:04,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 01:26:04,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 01:26:04,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 01:26:04,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 01:26:04,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 01:26:04,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 01:26:04,765 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-23 01:26:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:04,815 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-23 01:26:04,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 01:26:04,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-23 01:26:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:04,817 INFO L225 Difference]: With dead ends: 27 [2018-11-23 01:26:04,817 INFO L226 Difference]: Without dead ends: 23 [2018-11-23 01:26:04,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-23 01:26:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-23 01:26:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-23 01:26:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-23 01:26:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-23 01:26:04,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-23 01:26:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:04,823 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-23 01:26:04,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 01:26:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-23 01:26:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 01:26:04,824 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:04,824 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:04,824 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:04,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:04,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2018-11-23 01:26:04,824 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:04,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:04,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:04,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:26:04,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 01:26:04,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:04,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:04,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:26:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:04,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 01:26:05,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:05,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-23 01:26:05,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 01:26:05,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 01:26:05,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-23 01:26:05,022 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-23 01:26:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:05,113 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-23 01:26:05,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 01:26:05,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-23 01:26:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:05,114 INFO L225 Difference]: With dead ends: 38 [2018-11-23 01:26:05,114 INFO L226 Difference]: Without dead ends: 23 [2018-11-23 01:26:05,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-23 01:26:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-23 01:26:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-23 01:26:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 01:26:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-23 01:26:05,119 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-23 01:26:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:05,120 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-23 01:26:05,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 01:26:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-23 01:26:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-23 01:26:05,121 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:05,121 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:05,121 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:05,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:05,121 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2018-11-23 01:26:05,121 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:05,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:05,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:05,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:26:05,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 01:26:05,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:05,159 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:05,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:26:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:05,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-23 01:26:05,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:05,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 01:26:05,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 01:26:05,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 01:26:05,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 01:26:05,214 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-23 01:26:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:05,264 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-23 01:26:05,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 01:26:05,264 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-23 01:26:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:05,265 INFO L225 Difference]: With dead ends: 32 [2018-11-23 01:26:05,266 INFO L226 Difference]: Without dead ends: 28 [2018-11-23 01:26:05,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-23 01:26:05,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-23 01:26:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-23 01:26:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-23 01:26:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-23 01:26:05,272 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-23 01:26:05,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:05,272 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-23 01:26:05,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 01:26:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-23 01:26:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-23 01:26:05,274 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:05,274 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:05,274 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:05,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:05,274 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times [2018-11-23 01:26:05,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:05,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:05,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:05,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:26:05,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-23 01:26:05,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:05,318 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:05,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 01:26:05,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 01:26:05,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:05,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-23 01:26:05,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:05,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2018-11-23 01:26:05,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-23 01:26:05,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 01:26:05,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-23 01:26:05,402 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2018-11-23 01:26:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:05,506 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2018-11-23 01:26:05,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 01:26:05,507 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-11-23 01:26:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:05,508 INFO L225 Difference]: With dead ends: 40 [2018-11-23 01:26:05,508 INFO L226 Difference]: Without dead ends: 36 [2018-11-23 01:26:05,508 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-23 01:26:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-23 01:26:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-23 01:26:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-23 01:26:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-23 01:26:05,514 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-23 01:26:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:05,514 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-23 01:26:05,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-23 01:26:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-23 01:26:05,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-23 01:26:05,515 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:05,516 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 8, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:05,516 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:05,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:05,516 INFO L82 PathProgramCache]: Analyzing trace with hash 696026233, now seen corresponding path program 3 times [2018-11-23 01:26:05,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:05,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:05,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:05,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:26:05,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 110 proven. 8 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-11-23 01:26:05,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:05,630 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:05,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:26:05,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-23 01:26:05,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:05,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 130 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-11-23 01:26:05,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:05,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2018-11-23 01:26:05,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 01:26:05,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 01:26:05,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-23 01:26:05,734 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 11 states. [2018-11-23 01:26:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:05,850 INFO L93 Difference]: Finished difference Result 65 states and 113 transitions. [2018-11-23 01:26:05,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 01:26:05,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2018-11-23 01:26:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:05,852 INFO L225 Difference]: With dead ends: 65 [2018-11-23 01:26:05,852 INFO L226 Difference]: Without dead ends: 38 [2018-11-23 01:26:05,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-11-23 01:26:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-23 01:26:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2018-11-23 01:26:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-23 01:26:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2018-11-23 01:26:05,857 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 81 [2018-11-23 01:26:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:05,858 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2018-11-23 01:26:05,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 01:26:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2018-11-23 01:26:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-23 01:26:05,859 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:05,859 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:05,859 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:05,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash -987229488, now seen corresponding path program 4 times [2018-11-23 01:26:05,860 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:05,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:05,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:05,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:26:05,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-23 01:26:05,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:05,966 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:05,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 01:26:05,992 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 01:26:05,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:05,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-11-23 01:26:06,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:06,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2018-11-23 01:26:06,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 01:26:06,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 01:26:06,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-23 01:26:06,050 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 15 states. [2018-11-23 01:26:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:06,303 INFO L93 Difference]: Finished difference Result 83 states and 141 transitions. [2018-11-23 01:26:06,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-23 01:26:06,303 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2018-11-23 01:26:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:06,304 INFO L225 Difference]: With dead ends: 83 [2018-11-23 01:26:06,304 INFO L226 Difference]: Without dead ends: 54 [2018-11-23 01:26:06,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2018-11-23 01:26:06,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-23 01:26:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-23 01:26:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-23 01:26:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2018-11-23 01:26:06,312 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 96 [2018-11-23 01:26:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:06,313 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2018-11-23 01:26:06,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 01:26:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2018-11-23 01:26:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-23 01:26:06,314 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:06,314 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:06,315 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:06,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:06,315 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 5 times [2018-11-23 01:26:06,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:06,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:06,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:06,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:26:06,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-11-23 01:26:06,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:06,374 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:06,381 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 01:26:06,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-11-23 01:26:06,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:06,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2018-11-23 01:26:06,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:06,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2018-11-23 01:26:06,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 01:26:06,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 01:26:06,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-23 01:26:06,445 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 9 states. [2018-11-23 01:26:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:06,519 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2018-11-23 01:26:06,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 01:26:06,520 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2018-11-23 01:26:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:06,521 INFO L225 Difference]: With dead ends: 63 [2018-11-23 01:26:06,521 INFO L226 Difference]: Without dead ends: 59 [2018-11-23 01:26:06,522 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-23 01:26:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-23 01:26:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-11-23 01:26:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-23 01:26:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2018-11-23 01:26:06,527 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 109 [2018-11-23 01:26:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:06,527 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2018-11-23 01:26:06,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 01:26:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2018-11-23 01:26:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-11-23 01:26:06,529 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:06,529 INFO L402 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:06,530 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:06,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:06,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1510121204, now seen corresponding path program 6 times [2018-11-23 01:26:06,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:06,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:06,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:06,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:26:06,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 403 proven. 124 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-11-23 01:26:06,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:06,634 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:06,641 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 01:26:06,694 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-23 01:26:06,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:06,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 433 proven. 94 refuted. 0 times theorem prover too weak. 1714 trivial. 0 not checked. [2018-11-23 01:26:06,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:06,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-23 01:26:06,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 01:26:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 01:26:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-23 01:26:06,743 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 9 states. [2018-11-23 01:26:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:06,816 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2018-11-23 01:26:06,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 01:26:06,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 204 [2018-11-23 01:26:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:06,818 INFO L225 Difference]: With dead ends: 66 [2018-11-23 01:26:06,818 INFO L226 Difference]: Without dead ends: 62 [2018-11-23 01:26:06,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-23 01:26:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-23 01:26:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2018-11-23 01:26:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-23 01:26:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2018-11-23 01:26:06,823 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 204 [2018-11-23 01:26:06,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:06,823 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2018-11-23 01:26:06,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 01:26:06,824 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2018-11-23 01:26:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-23 01:26:06,826 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:06,826 INFO L402 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:06,826 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:06,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:06,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1009195755, now seen corresponding path program 7 times [2018-11-23 01:26:06,827 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:06,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:06,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:06,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:26:06,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2018-11-23 01:26:06,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:06,936 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:06,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:26:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:07,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2018-11-23 01:26:07,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:07,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2018-11-23 01:26:07,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-23 01:26:07,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 01:26:07,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-23 01:26:07,106 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand 10 states. [2018-11-23 01:26:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:07,240 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2018-11-23 01:26:07,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 01:26:07,240 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 218 [2018-11-23 01:26:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:07,242 INFO L225 Difference]: With dead ends: 71 [2018-11-23 01:26:07,242 INFO L226 Difference]: Without dead ends: 67 [2018-11-23 01:26:07,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-11-23 01:26:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-23 01:26:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2018-11-23 01:26:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-23 01:26:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 89 transitions. [2018-11-23 01:26:07,250 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 89 transitions. Word has length 218 [2018-11-23 01:26:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:07,250 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 89 transitions. [2018-11-23 01:26:07,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-23 01:26:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 89 transitions. [2018-11-23 01:26:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-11-23 01:26:07,254 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:07,254 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 36, 22, 22, 22, 22, 22, 22, 22, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:07,255 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:07,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1058976484, now seen corresponding path program 8 times [2018-11-23 01:26:07,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:07,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:07,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:07,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 01:26:07,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 814 proven. 621 refuted. 0 times theorem prover too weak. 4079 trivial. 0 not checked. [2018-11-23 01:26:07,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:07,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:07,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 01:26:07,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 01:26:07,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:07,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 213 proven. 1259 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2018-11-23 01:26:07,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:07,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2018-11-23 01:26:07,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 01:26:07,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 01:26:07,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-23 01:26:07,622 INFO L87 Difference]: Start difference. First operand 64 states and 89 transitions. Second operand 19 states. [2018-11-23 01:26:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:08,172 INFO L93 Difference]: Finished difference Result 160 states and 292 transitions. [2018-11-23 01:26:08,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-23 01:26:08,172 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 313 [2018-11-23 01:26:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:08,174 INFO L225 Difference]: With dead ends: 160 [2018-11-23 01:26:08,174 INFO L226 Difference]: Without dead ends: 106 [2018-11-23 01:26:08,175 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=1668, Unknown=0, NotChecked=0, Total=2162 [2018-11-23 01:26:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-23 01:26:08,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2018-11-23 01:26:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-23 01:26:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 138 transitions. [2018-11-23 01:26:08,185 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 138 transitions. Word has length 313 [2018-11-23 01:26:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:08,186 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 138 transitions. [2018-11-23 01:26:08,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 01:26:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 138 transitions. [2018-11-23 01:26:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-11-23 01:26:08,189 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:08,189 INFO L402 BasicCegarLoop]: trace histogram [77, 77, 62, 38, 38, 38, 38, 38, 38, 38, 24, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:08,189 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:08,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash 15696592, now seen corresponding path program 9 times [2018-11-23 01:26:08,189 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:08,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:08,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:08,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:26:08,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 425 proven. 2285 refuted. 0 times theorem prover too weak. 13697 trivial. 0 not checked. [2018-11-23 01:26:08,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:08,469 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:08,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 01:26:08,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-11-23 01:26:08,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:08,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16407 backedges. 2720 proven. 296 refuted. 0 times theorem prover too weak. 13391 trivial. 0 not checked. [2018-11-23 01:26:08,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:08,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2018-11-23 01:26:08,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-23 01:26:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-23 01:26:08,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-11-23 01:26:08,774 INFO L87 Difference]: Start difference. First operand 99 states and 138 transitions. Second operand 18 states. [2018-11-23 01:26:09,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:09,195 INFO L93 Difference]: Finished difference Result 225 states and 372 transitions. [2018-11-23 01:26:09,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-23 01:26:09,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 531 [2018-11-23 01:26:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:09,196 INFO L225 Difference]: With dead ends: 225 [2018-11-23 01:26:09,196 INFO L226 Difference]: Without dead ends: 131 [2018-11-23 01:26:09,197 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=508, Invalid=1844, Unknown=0, NotChecked=0, Total=2352 [2018-11-23 01:26:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-11-23 01:26:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2018-11-23 01:26:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-11-23 01:26:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 156 transitions. [2018-11-23 01:26:09,206 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 156 transitions. Word has length 531 [2018-11-23 01:26:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:09,206 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 156 transitions. [2018-11-23 01:26:09,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-23 01:26:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 156 transitions. [2018-11-23 01:26:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 900 [2018-11-23 01:26:09,210 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:09,211 INFO L402 BasicCegarLoop]: trace histogram [131, 131, 106, 65, 65, 65, 65, 65, 65, 65, 41, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:09,211 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:09,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1889376797, now seen corresponding path program 10 times [2018-11-23 01:26:09,211 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:09,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:09,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:09,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:26:09,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 47945 backedges. 3566 proven. 2155 refuted. 0 times theorem prover too weak. 42224 trivial. 0 not checked. [2018-11-23 01:26:09,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:09,674 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:09,682 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 01:26:09,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 01:26:09,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:09,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 47945 backedges. 3576 proven. 2138 refuted. 0 times theorem prover too weak. 42231 trivial. 0 not checked. [2018-11-23 01:26:10,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:10,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2018-11-23 01:26:10,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-23 01:26:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-23 01:26:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-11-23 01:26:10,121 INFO L87 Difference]: Start difference. First operand 116 states and 156 transitions. Second operand 16 states. [2018-11-23 01:26:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:10,247 INFO L93 Difference]: Finished difference Result 157 states and 240 transitions. [2018-11-23 01:26:10,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-23 01:26:10,247 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 899 [2018-11-23 01:26:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:10,250 INFO L225 Difference]: With dead ends: 157 [2018-11-23 01:26:10,250 INFO L226 Difference]: Without dead ends: 140 [2018-11-23 01:26:10,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 904 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2018-11-23 01:26:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-11-23 01:26:10,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-11-23 01:26:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-11-23 01:26:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 189 transitions. [2018-11-23 01:26:10,262 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 189 transitions. Word has length 899 [2018-11-23 01:26:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:10,263 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 189 transitions. [2018-11-23 01:26:10,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-23 01:26:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 189 transitions. [2018-11-23 01:26:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2018-11-23 01:26:10,267 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:10,267 INFO L402 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:10,268 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:10,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:10,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 11 times [2018-11-23 01:26:10,268 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:10,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:10,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:10,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:26:10,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-23 01:26:11,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:11,180 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:11,189 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 01:26:11,505 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 93 check-sat command(s) [2018-11-23 01:26:11,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:11,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-23 01:26:12,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:12,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2018-11-23 01:26:12,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-23 01:26:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-23 01:26:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 01:26:12,340 INFO L87 Difference]: Start difference. First operand 140 states and 189 transitions. Second operand 36 states. [2018-11-23 01:26:12,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:12,702 INFO L93 Difference]: Finished difference Result 157 states and 219 transitions. [2018-11-23 01:26:12,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-23 01:26:12,703 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2018-11-23 01:26:12,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:12,704 INFO L225 Difference]: With dead ends: 157 [2018-11-23 01:26:12,705 INFO L226 Difference]: Without dead ends: 153 [2018-11-23 01:26:12,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 880 SyntacticMatches, 55 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 01:26:12,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-23 01:26:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2018-11-23 01:26:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-23 01:26:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 205 transitions. [2018-11-23 01:26:12,714 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 205 transitions. Word has length 749 [2018-11-23 01:26:12,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:12,715 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 205 transitions. [2018-11-23 01:26:12,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-23 01:26:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 205 transitions. [2018-11-23 01:26:12,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2018-11-23 01:26:12,721 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 01:26:12,721 INFO L402 BasicCegarLoop]: trace histogram [115, 115, 93, 57, 57, 57, 57, 57, 57, 57, 36, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 01:26:12,722 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 01:26:12,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 01:26:12,722 INFO L82 PathProgramCache]: Analyzing trace with hash 464489697, now seen corresponding path program 12 times [2018-11-23 01:26:12,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 01:26:12,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 01:26:12,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:12,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 01:26:12,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 01:26:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 01:26:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36882 backedges. 954 proven. 4596 refuted. 0 times theorem prover too weak. 31332 trivial. 0 not checked. [2018-11-23 01:26:13,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 01:26:13,137 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 01:26:13,143 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 01:26:13,238 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-11-23 01:26:13,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 01:26:13,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 01:26:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36882 backedges. 12139 proven. 125 refuted. 0 times theorem prover too weak. 24618 trivial. 0 not checked. [2018-11-23 01:26:13,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 01:26:13,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2018-11-23 01:26:13,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 01:26:13,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 01:26:13,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-11-23 01:26:13,490 INFO L87 Difference]: Start difference. First operand 147 states and 205 transitions. Second operand 21 states. [2018-11-23 01:26:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 01:26:13,829 INFO L93 Difference]: Finished difference Result 286 states and 510 transitions. [2018-11-23 01:26:13,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-23 01:26:13,830 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 790 [2018-11-23 01:26:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 01:26:13,830 INFO L225 Difference]: With dead ends: 286 [2018-11-23 01:26:13,830 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 01:26:13,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=930, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 01:26:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 01:26:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 01:26:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 01:26:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 01:26:13,833 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 790 [2018-11-23 01:26:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 01:26:13,833 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 01:26:13,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 01:26:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 01:26:13,833 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 01:26:13,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 01:26:14,677 WARN L180 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 58 [2018-11-23 01:26:14,679 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-23 01:26:14,679 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-23 01:26:14,679 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (< 1 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-23 01:26:14,679 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-23 01:26:14,679 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (let ((.cse0 (<= |fibonacci_#t~ret0| 1)) (.cse1 (<= 1 |fibonacci_#t~ret0|))) (or (and .cse0 (<= |fibonacci_#in~n| 3) .cse1 (<= 3 fibonacci_~n)) (and (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#t~ret0| 3) (<= |fibonacci_#in~n| 5) (<= 5 fibonacci_~n)) (and .cse0 .cse1 (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n)) (<= 10 |fibonacci_#in~n|) (and (<= |fibonacci_#t~ret0| 21) (<= 21 |fibonacci_#t~ret0|) (<= 9 |fibonacci_#in~n|)) (and (<= 13 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 8) (<= 8 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 13)) (and (<= 4 |fibonacci_#in~n|) (<= |fibonacci_#t~ret0| 2) (<= |fibonacci_#in~n| 4) (<= 2 |fibonacci_#t~ret0|)) (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6) (<= |fibonacci_#t~ret0| 5) (<= 6 fibonacci_~n)) (and (<= |fibonacci_#t~ret0| 8) (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7) (<= 7 fibonacci_~n)))) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-23 01:26:14,679 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-23 01:26:14,679 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-23 01:26:14,679 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-23 01:26:14,679 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-23 01:26:14,679 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 01:26:14,679 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 01:26:14,679 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 01:26:14,679 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 01:26:14,679 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 01:26:14,679 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 01:26:14,680 INFO L448 ceAbstractionStarter]: For program point L31(line 31) no Hoare annotation was computed. [2018-11-23 01:26:14,680 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed. [2018-11-23 01:26:14,680 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2018-11-23 01:26:14,680 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2018-11-23 01:26:14,680 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-11-23 01:26:14,680 INFO L444 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= 9 main_~x~0) (<= main_~x~0 9)) [2018-11-23 01:26:14,680 INFO L448 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2018-11-23 01:26:14,680 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2018-11-23 01:26:14,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:26:14 BoogieIcfgContainer [2018-11-23 01:26:14,682 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 01:26:14,682 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 01:26:14,682 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 01:26:14,682 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 01:26:14,682 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:26:04" (3/4) ... [2018-11-23 01:26:14,685 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 01:26:14,689 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-23 01:26:14,689 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 01:26:14,689 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 01:26:14,692 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 01:26:14,692 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 01:26:14,693 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 01:26:14,720 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8e49449d-3436-4846-8638-38dd030c44ac/bin-2019/uautomizer/witness.graphml [2018-11-23 01:26:14,721 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 01:26:14,721 INFO L168 Benchmark]: Toolchain (without parser) took 10632.42 ms. Allocated memory was 1.0 GB in the beginning and 2.0 GB in the end (delta: 977.3 MB). Free memory was 952.7 MB in the beginning and 1.3 GB in the end (delta: -350.0 MB). Peak memory consumption was 627.3 MB. Max. memory is 11.5 GB. [2018-11-23 01:26:14,722 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:26:14,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.37 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 01:26:14,722 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.10 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:26:14,723 INFO L168 Benchmark]: Boogie Preprocessor took 9.70 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 939.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 01:26:14,723 INFO L168 Benchmark]: RCFGBuilder took 154.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-23 01:26:14,723 INFO L168 Benchmark]: TraceAbstraction took 10263.92 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 839.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -180.8 MB). Peak memory consumption was 658.6 MB. Max. memory is 11.5 GB. [2018-11-23 01:26:14,724 INFO L168 Benchmark]: Witness Printer took 38.65 ms. Allocated memory is still 2.0 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 01:26:14,725 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 151.37 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 942.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.10 ms. Allocated memory is still 1.0 GB. Free memory is still 942.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.70 ms. Allocated memory is still 1.0 GB. Free memory was 942.0 MB in the beginning and 939.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 154.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10263.92 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 839.4 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -180.8 MB). Peak memory consumption was 658.6 MB. Max. memory is 11.5 GB. * Witness Printer took 38.65 ms. Allocated memory is still 2.0 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 10.2s OverallTime, 15 OverallIterations, 131 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 379 SDtfs, 634 SDslu, 2355 SDs, 0 SdLazy, 3091 SolverSat, 747 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4582 GetRequests, 4234 SyntacticMatches, 57 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 42 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 272 PreInvPairs, 507 NumberOfFragments, 137 HoareAnnotationTreeSize, 272 FomulaSimplifications, 2180 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 4642 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 8193 NumberOfCodeBlocks, 7289 NumberOfCodeBlocksAsserted, 227 NumberOfCheckSat, 8165 ConstructedInterpolants, 0 QuantifiedInterpolants, 9519771 SizeOfPredicates, 69 NumberOfNonLiveVariables, 6952 ConjunctsInSsa, 576 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 254718/292044 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...