./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 18:53:01,200 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 18:53:01,201 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 18:53:01,209 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 18:53:01,210 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 18:53:01,210 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 18:53:01,211 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 18:53:01,212 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 18:53:01,213 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 18:53:01,214 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 18:53:01,215 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 18:53:01,215 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 18:53:01,216 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 18:53:01,216 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 18:53:01,217 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 18:53:01,218 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 18:53:01,218 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 18:53:01,219 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 18:53:01,221 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 18:53:01,222 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 18:53:01,223 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 18:53:01,223 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 18:53:01,225 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 18:53:01,225 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 18:53:01,226 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 18:53:01,226 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 18:53:01,227 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 18:53:01,227 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 18:53:01,228 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 18:53:01,229 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 18:53:01,229 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 18:53:01,229 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 18:53:01,230 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 18:53:01,230 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 18:53:01,231 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 18:53:01,231 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 18:53:01,231 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 18:53:01,242 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 18:53:01,242 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 18:53:01,242 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 18:53:01,242 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 18:53:01,243 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 18:53:01,243 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 18:53:01,243 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 18:53:01,243 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 18:53:01,243 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 18:53:01,243 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 18:53:01,244 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 18:53:01,244 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 18:53:01,244 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 18:53:01,244 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 18:53:01,245 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 18:53:01,245 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 18:53:01,245 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 18:53:01,245 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 18:53:01,245 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 18:53:01,245 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 18:53:01,245 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 18:53:01,246 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 18:53:01,246 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 18:53:01,246 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 18:53:01,246 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 18:53:01,246 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 18:53:01,246 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 18:53:01,246 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 18:53:01,246 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 18:53:01,246 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 18:53:01,247 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 18:53:01,247 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 18:53:01,247 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 18:53:01,247 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 18:53:01,247 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 18:53:01,247 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 18:53:01,247 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e1fd2ba6533b7d8cc379ec5987b906d551e69a3 [2018-12-02 18:53:01,270 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 18:53:01,278 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 18:53:01,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 18:53:01,282 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 18:53:01,282 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 18:53:01,282 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-12-02 18:53:01,324 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/data/eb6c5813a/50e4fb1bdd3e497a9004bf432b86e5ab/FLAGf12229e19 [2018-12-02 18:53:01,702 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 18:53:01,702 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-12-02 18:53:01,705 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/data/eb6c5813a/50e4fb1bdd3e497a9004bf432b86e5ab/FLAGf12229e19 [2018-12-02 18:53:02,146 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/data/eb6c5813a/50e4fb1bdd3e497a9004bf432b86e5ab [2018-12-02 18:53:02,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 18:53:02,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 18:53:02,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 18:53:02,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 18:53:02,153 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 18:53:02,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d10e54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02, skipping insertion in model container [2018-12-02 18:53:02,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 18:53:02,169 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 18:53:02,250 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 18:53:02,252 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 18:53:02,260 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 18:53:02,268 INFO L195 MainTranslator]: Completed translation [2018-12-02 18:53:02,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02 WrapperNode [2018-12-02 18:53:02,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 18:53:02,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 18:53:02,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 18:53:02,269 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 18:53:02,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 18:53:02,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 18:53:02,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 18:53:02,280 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 18:53:02,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... [2018-12-02 18:53:02,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 18:53:02,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 18:53:02,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 18:53:02,291 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 18:53:02,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 18:53:02,352 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-12-02 18:53:02,353 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-12-02 18:53:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 18:53:02,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 18:53:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 18:53:02,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 18:53:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 18:53:02,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 18:53:02,436 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 18:53:02,436 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-02 18:53:02,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:53:02 BoogieIcfgContainer [2018-12-02 18:53:02,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 18:53:02,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 18:53:02,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 18:53:02,439 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 18:53:02,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:53:02" (1/3) ... [2018-12-02 18:53:02,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32989f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:53:02, skipping insertion in model container [2018-12-02 18:53:02,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:02" (2/3) ... [2018-12-02 18:53:02,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32989f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:53:02, skipping insertion in model container [2018-12-02 18:53:02,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:53:02" (3/3) ... [2018-12-02 18:53:02,441 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-12-02 18:53:02,448 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 18:53:02,452 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 18:53:02,462 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 18:53:02,480 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 18:53:02,481 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 18:53:02,481 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 18:53:02,481 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 18:53:02,481 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 18:53:02,481 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 18:53:02,481 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 18:53:02,481 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 18:53:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-12-02 18:53:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-02 18:53:02,495 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:02,495 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:02,496 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:02,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-12-02 18:53:02,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:02,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:02,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:02,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:02,532 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 18:53:02,595 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 18:53:02,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 18:53:02,595 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 18:53:02,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 18:53:02,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 18:53:02,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 18:53:02,607 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-12-02 18:53:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:02,661 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-12-02 18:53:02,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 18:53:02,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-02 18:53:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:02,667 INFO L225 Difference]: With dead ends: 36 [2018-12-02 18:53:02,668 INFO L226 Difference]: Without dead ends: 22 [2018-12-02 18:53:02,669 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 [2018-12-02 18:53:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-02 18:53:02,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-02 18:53:02,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-02 18:53:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-12-02 18:53:02,693 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-12-02 18:53:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:02,694 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-12-02 18:53:02,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 18:53:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-12-02 18:53:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-02 18:53:02,695 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:02,695 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:02,695 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:02,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:02,695 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2018-12-02 18:53:02,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:02,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:02,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:02,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:02,696 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 18:53:02,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 18:53:02,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 18:53:02,727 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 18:53:02,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 18:53:02,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 18:53:02,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 18:53:02,728 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2018-12-02 18:53:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:02,760 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2018-12-02 18:53:02,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 18:53:02,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-12-02 18:53:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:02,761 INFO L225 Difference]: With dead ends: 28 [2018-12-02 18:53:02,761 INFO L226 Difference]: Without dead ends: 24 [2018-12-02 18:53:02,762 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 [2018-12-02 18:53:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-02 18:53:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-12-02 18:53:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-02 18:53:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-12-02 18:53:02,765 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2018-12-02 18:53:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:02,765 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-12-02 18:53:02,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 18:53:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-12-02 18:53:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-02 18:53:02,766 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:02,766 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] [2018-12-02 18:53:02,766 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:02,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:02,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-12-02 18:53:02,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:02,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:02,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:02,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:02,767 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 18:53:02,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:02,803 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:02,804 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-12-02 18:53:02,805 INFO L205 CegarAbsIntRunner]: [0], [3], [4], [8], [10], [12], [13], [14], [18], [22], [24], [28], [30], [33], [34], [35], [36], [37], [38], [39], [41], [42] [2018-12-02 18:53:02,825 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 18:53:02,825 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 18:53:02,992 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 18:53:02,993 INFO L272 AbstractInterpreter]: Visited 22 different actions 283 times. Never merged. Never widened. Performed 590 root evaluator evaluations with a maximum evaluation depth of 4. Performed 590 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 32 fixpoints after 3 different actions. Largest state had 5 variables. [2018-12-02 18:53:03,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:03,001 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 18:53:03,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:03,001 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:03,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:03,007 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 18:53:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:03,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 18:53:03,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-02 18:53:03,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:03,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2018-12-02 18:53:03,156 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:03,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 18:53:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 18:53:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-12-02 18:53:03,156 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2018-12-02 18:53:03,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:03,218 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-12-02 18:53:03,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 18:53:03,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-12-02 18:53:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:03,219 INFO L225 Difference]: With dead ends: 39 [2018-12-02 18:53:03,219 INFO L226 Difference]: Without dead ends: 24 [2018-12-02 18:53:03,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-12-02 18:53:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-02 18:53:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-02 18:53:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-02 18:53:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-12-02 18:53:03,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-12-02 18:53:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:03,223 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-12-02 18:53:03,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 18:53:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-12-02 18:53:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-02 18:53:03,224 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:03,224 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, 1] [2018-12-02 18:53:03,224 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:03,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-12-02 18:53:03,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:03,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:03,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:03,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:03,225 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-02 18:53:03,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:03,256 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:03,256 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-12-02 18:53:03,256 INFO L205 CegarAbsIntRunner]: [0], [3], [4], [7], [8], [10], [12], [13], [14], [18], [22], [24], [28], [30], [33], [34], [35], [36], [37], [38], [39], [41], [42] [2018-12-02 18:53:03,257 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 18:53:03,257 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 18:53:04,008 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 18:53:04,008 INFO L272 AbstractInterpreter]: Visited 23 different actions 4122 times. Merged at 10 different actions 1354 times. Never widened. Performed 10130 root evaluator evaluations with a maximum evaluation depth of 4. Performed 10130 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 592 fixpoints after 6 different actions. Largest state had 5 variables. [2018-12-02 18:53:04,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:04,017 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 18:53:04,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:04,017 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:04,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:04,024 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 18:53:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:04,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-02 18:53:04,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-02 18:53:04,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:04,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2018-12-02 18:53:04,156 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:04,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 18:53:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 18:53:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-12-02 18:53:04,156 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2018-12-02 18:53:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:04,191 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2018-12-02 18:53:04,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 18:53:04,192 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-12-02 18:53:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:04,193 INFO L225 Difference]: With dead ends: 33 [2018-12-02 18:53:04,193 INFO L226 Difference]: Without dead ends: 29 [2018-12-02 18:53:04,194 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-12-02 18:53:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-02 18:53:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-02 18:53:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-02 18:53:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-12-02 18:53:04,199 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-12-02 18:53:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:04,200 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-12-02 18:53:04,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 18:53:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-12-02 18:53:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-02 18:53:04,201 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:04,201 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, 1] [2018-12-02 18:53:04,201 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:04,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-12-02 18:53:04,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:04,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:04,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:04,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:04,203 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-02 18:53:04,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:04,251 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:04,251 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:04,251 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:04,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:04,251 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:04,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 18:53:04,257 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 18:53:04,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-02 18:53:04,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 18:53:04,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-02 18:53:04,271 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-02 18:53:04,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:04,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2018-12-02 18:53:04,377 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:04,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 18:53:04,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 18:53:04,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-12-02 18:53:04,378 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 6 states. [2018-12-02 18:53:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:04,411 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2018-12-02 18:53:04,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 18:53:04,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-12-02 18:53:04,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:04,412 INFO L225 Difference]: With dead ends: 39 [2018-12-02 18:53:04,412 INFO L226 Difference]: Without dead ends: 35 [2018-12-02 18:53:04,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-12-02 18:53:04,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-02 18:53:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2018-12-02 18:53:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-02 18:53:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-12-02 18:53:04,417 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 41 [2018-12-02 18:53:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:04,417 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-12-02 18:53:04,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 18:53:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-12-02 18:53:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-02 18:53:04,418 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:04,418 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:04,418 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:04,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:04,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2018-12-02 18:53:04,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:04,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:04,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 18:53:04,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:04,419 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-02 18:53:04,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:04,459 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:04,459 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:04,460 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:04,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:04,460 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:04,465 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 18:53:04,466 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 18:53:04,473 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 18:53:04,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 18:53:04,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-12-02 18:53:04,483 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-12-02 18:53:04,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:04,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 12 [2018-12-02 18:53:04,648 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:04,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 18:53:04,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 18:53:04,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-12-02 18:53:04,649 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 7 states. [2018-12-02 18:53:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:04,695 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2018-12-02 18:53:04,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 18:53:04,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2018-12-02 18:53:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:04,696 INFO L225 Difference]: With dead ends: 41 [2018-12-02 18:53:04,696 INFO L226 Difference]: Without dead ends: 37 [2018-12-02 18:53:04,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2018-12-02 18:53:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-12-02 18:53:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-12-02 18:53:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-02 18:53:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2018-12-02 18:53:04,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 42 [2018-12-02 18:53:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:04,703 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2018-12-02 18:53:04,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 18:53:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2018-12-02 18:53:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-12-02 18:53:04,705 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:04,705 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:04,705 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:04,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1539529542, now seen corresponding path program 4 times [2018-12-02 18:53:04,705 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:04,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:04,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 18:53:04,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:04,706 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 47 proven. 43 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-12-02 18:53:04,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:04,776 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:04,776 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:04,776 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:04,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:04,777 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:04,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:04,782 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 18:53:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:04,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-12-02 18:53:04,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 99 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-12-02 18:53:05,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:05,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2018-12-02 18:53:05,139 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:05,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-02 18:53:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-02 18:53:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2018-12-02 18:53:05,140 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand 14 states. [2018-12-02 18:53:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:05,404 INFO L93 Difference]: Finished difference Result 80 states and 135 transitions. [2018-12-02 18:53:05,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-02 18:53:05,404 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2018-12-02 18:53:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:05,405 INFO L225 Difference]: With dead ends: 80 [2018-12-02 18:53:05,405 INFO L226 Difference]: Without dead ends: 51 [2018-12-02 18:53:05,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2018-12-02 18:53:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-02 18:53:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2018-12-02 18:53:05,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-02 18:53:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2018-12-02 18:53:05,410 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 68 [2018-12-02 18:53:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:05,410 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2018-12-02 18:53:05,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-02 18:53:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2018-12-02 18:53:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-12-02 18:53:05,411 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:05,411 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, 1] [2018-12-02 18:53:05,412 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:05,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:05,412 INFO L82 PathProgramCache]: Analyzing trace with hash 946234379, now seen corresponding path program 5 times [2018-12-02 18:53:05,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:05,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:05,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:05,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:05,412 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-12-02 18:53:05,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:05,464 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:05,464 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:05,465 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:05,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:05,465 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:05,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 18:53:05,471 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 18:53:05,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-02 18:53:05,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 18:53:05,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 41 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-12-02 18:53:05,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 50 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-12-02 18:53:05,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:05,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2018-12-02 18:53:05,715 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:05,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 18:53:05,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 18:53:05,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-12-02 18:53:05,715 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 8 states. [2018-12-02 18:53:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:05,778 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2018-12-02 18:53:05,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 18:53:05,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2018-12-02 18:53:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:05,780 INFO L225 Difference]: With dead ends: 56 [2018-12-02 18:53:05,780 INFO L226 Difference]: Without dead ends: 52 [2018-12-02 18:53:05,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 214 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2018-12-02 18:53:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-02 18:53:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2018-12-02 18:53:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-02 18:53:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2018-12-02 18:53:05,785 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 110 [2018-12-02 18:53:05,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:05,786 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2018-12-02 18:53:05,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 18:53:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2018-12-02 18:53:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-12-02 18:53:05,787 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:05,787 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:05,787 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:05,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:05,787 INFO L82 PathProgramCache]: Analyzing trace with hash 551748881, now seen corresponding path program 6 times [2018-12-02 18:53:05,788 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:05,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:05,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 18:53:05,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:05,788 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-12-02 18:53:05,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:05,847 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:05,847 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:05,847 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:05,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:05,847 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:05,854 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 18:53:05,854 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 18:53:05,871 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 18:53:05,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 18:53:05,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 189 proven. 343 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2018-12-02 18:53:05,932 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 365 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2018-12-02 18:53:06,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:06,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 18] total 23 [2018-12-02 18:53:06,558 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:06,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-02 18:53:06,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-02 18:53:06,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2018-12-02 18:53:06,559 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 15 states. [2018-12-02 18:53:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:06,790 INFO L93 Difference]: Finished difference Result 112 states and 178 transitions. [2018-12-02 18:53:06,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-02 18:53:06,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 137 [2018-12-02 18:53:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:06,791 INFO L225 Difference]: With dead ends: 112 [2018-12-02 18:53:06,791 INFO L226 Difference]: Without dead ends: 67 [2018-12-02 18:53:06,792 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 248 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2018-12-02 18:53:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-02 18:53:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-12-02 18:53:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-02 18:53:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2018-12-02 18:53:06,796 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 137 [2018-12-02 18:53:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:06,796 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2018-12-02 18:53:06,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-02 18:53:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2018-12-02 18:53:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-12-02 18:53:06,798 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:06,798 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, 1] [2018-12-02 18:53:06,798 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:06,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:06,798 INFO L82 PathProgramCache]: Analyzing trace with hash -516480259, now seen corresponding path program 7 times [2018-12-02 18:53:06,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:06,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:06,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 18:53:06,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:06,799 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 137 proven. 567 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2018-12-02 18:53:06,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:06,863 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:06,864 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:06,864 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:06,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:06,864 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:06,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:06,872 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 18:53:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:06,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 716 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2018-12-02 18:53:06,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 108 proven. 756 refuted. 0 times theorem prover too weak. 1716 trivial. 0 not checked. [2018-12-02 18:53:07,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:07,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 15] total 18 [2018-12-02 18:53:07,621 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:07,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-02 18:53:07,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-02 18:53:07,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-12-02 18:53:07,622 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 10 states. [2018-12-02 18:53:07,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:07,695 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2018-12-02 18:53:07,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-02 18:53:07,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 219 [2018-12-02 18:53:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:07,696 INFO L225 Difference]: With dead ends: 72 [2018-12-02 18:53:07,696 INFO L226 Difference]: Without dead ends: 68 [2018-12-02 18:53:07,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 423 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2018-12-02 18:53:07,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-02 18:53:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-02 18:53:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-02 18:53:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2018-12-02 18:53:07,701 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 219 [2018-12-02 18:53:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:07,702 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2018-12-02 18:53:07,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-02 18:53:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2018-12-02 18:53:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-12-02 18:53:07,704 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:07,704 INFO L402 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:07,704 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:07,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:07,705 INFO L82 PathProgramCache]: Analyzing trace with hash 177464299, now seen corresponding path program 8 times [2018-12-02 18:53:07,705 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:07,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:07,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:07,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:07,705 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 829 proven. 826 refuted. 0 times theorem prover too weak. 5465 trivial. 0 not checked. [2018-12-02 18:53:07,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:07,845 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:07,845 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:07,845 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:07,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:07,845 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:07,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 18:53:07,851 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 18:53:07,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-12-02 18:53:07,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 18:53:07,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 1310 proven. 123 refuted. 0 times theorem prover too weak. 5687 trivial. 0 not checked. [2018-12-02 18:53:07,973 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 1310 proven. 134 refuted. 0 times theorem prover too weak. 5676 trivial. 0 not checked. [2018-12-02 18:53:08,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:08,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 13] total 22 [2018-12-02 18:53:08,671 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:08,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-02 18:53:08,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-02 18:53:08,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2018-12-02 18:53:08,672 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 17 states. [2018-12-02 18:53:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:08,917 INFO L93 Difference]: Finished difference Result 142 states and 230 transitions. [2018-12-02 18:53:08,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-02 18:53:08,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 355 [2018-12-02 18:53:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:08,919 INFO L225 Difference]: With dead ends: 142 [2018-12-02 18:53:08,919 INFO L226 Difference]: Without dead ends: 81 [2018-12-02 18:53:08,920 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 693 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=824, Unknown=0, NotChecked=0, Total=1122 [2018-12-02 18:53:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-12-02 18:53:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2018-12-02 18:53:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-12-02 18:53:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2018-12-02 18:53:08,927 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 355 [2018-12-02 18:53:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:08,928 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2018-12-02 18:53:08,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-02 18:53:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2018-12-02 18:53:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-12-02 18:53:08,934 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:08,934 INFO L402 BasicCegarLoop]: trace histogram [63, 63, 51, 31, 31, 31, 31, 31, 31, 31, 20, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:08,934 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:08,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1687252273, now seen corresponding path program 9 times [2018-12-02 18:53:08,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:08,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:08,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 18:53:08,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:08,936 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 299 proven. 1577 refuted. 0 times theorem prover too weak. 9071 trivial. 0 not checked. [2018-12-02 18:53:09,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:09,072 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:09,072 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:09,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:09,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:09,072 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:09,078 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 18:53:09,078 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 18:53:09,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 18:53:09,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 18:53:09,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 5951 proven. 813 refuted. 0 times theorem prover too weak. 4183 trivial. 0 not checked. [2018-12-02 18:53:09,263 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 631 proven. 2533 refuted. 0 times theorem prover too weak. 7783 trivial. 0 not checked. [2018-12-02 18:53:10,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:10,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 22] total 28 [2018-12-02 18:53:10,713 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:10,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-02 18:53:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-02 18:53:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2018-12-02 18:53:10,714 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 18 states. [2018-12-02 18:53:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:11,130 INFO L93 Difference]: Finished difference Result 178 states and 283 transitions. [2018-12-02 18:53:11,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-02 18:53:11,131 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 437 [2018-12-02 18:53:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:11,132 INFO L225 Difference]: With dead ends: 178 [2018-12-02 18:53:11,132 INFO L226 Difference]: Without dead ends: 110 [2018-12-02 18:53:11,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 843 SyntacticMatches, 19 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=752, Invalid=2218, Unknown=0, NotChecked=0, Total=2970 [2018-12-02 18:53:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-12-02 18:53:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2018-12-02 18:53:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-02 18:53:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2018-12-02 18:53:11,141 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 437 [2018-12-02 18:53:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:11,141 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2018-12-02 18:53:11,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-02 18:53:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2018-12-02 18:53:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2018-12-02 18:53:11,145 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:11,145 INFO L402 BasicCegarLoop]: trace histogram [97, 97, 78, 48, 48, 48, 48, 48, 48, 48, 30, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:11,146 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:11,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:11,146 INFO L82 PathProgramCache]: Analyzing trace with hash 616438622, now seen corresponding path program 10 times [2018-12-02 18:53:11,146 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:11,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:11,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 18:53:11,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:11,147 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 26139 backedges. 475 proven. 3007 refuted. 0 times theorem prover too weak. 22657 trivial. 0 not checked. [2018-12-02 18:53:11,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:11,416 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:11,416 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:11,416 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:11,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:11,416 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:11,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:11,423 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 18:53:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:11,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 26139 backedges. 436 proven. 3527 refuted. 0 times theorem prover too weak. 22176 trivial. 0 not checked. [2018-12-02 18:53:11,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 26139 backedges. 436 proven. 3604 refuted. 0 times theorem prover too weak. 22099 trivial. 0 not checked. [2018-12-02 18:53:13,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:13,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 19] total 20 [2018-12-02 18:53:13,374 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:13,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 18:53:13,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 18:53:13,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-12-02 18:53:13,375 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 12 states. [2018-12-02 18:53:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:13,503 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2018-12-02 18:53:13,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 18:53:13,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 668 [2018-12-02 18:53:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:13,505 INFO L225 Difference]: With dead ends: 108 [2018-12-02 18:53:13,505 INFO L226 Difference]: Without dead ends: 104 [2018-12-02 18:53:13,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1360 GetRequests, 1317 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2018-12-02 18:53:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-12-02 18:53:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-12-02 18:53:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-02 18:53:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 149 transitions. [2018-12-02 18:53:13,514 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 149 transitions. Word has length 668 [2018-12-02 18:53:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:13,515 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 149 transitions. [2018-12-02 18:53:13,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 18:53:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 149 transitions. [2018-12-02 18:53:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2018-12-02 18:53:13,523 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:13,523 INFO L402 BasicCegarLoop]: trace histogram [165, 165, 133, 82, 82, 82, 82, 82, 82, 82, 51, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:13,523 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:13,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:13,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1673807994, now seen corresponding path program 11 times [2018-12-02 18:53:13,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:13,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:13,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:13,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:13,525 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 76182 backedges. 3998 proven. 5485 refuted. 0 times theorem prover too weak. 66699 trivial. 0 not checked. [2018-12-02 18:53:14,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:14,045 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:14,045 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:14,045 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:14,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:14,045 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:14,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 18:53:14,051 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 18:53:14,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2018-12-02 18:53:14,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 18:53:14,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 76182 backedges. 24906 proven. 296 refuted. 0 times theorem prover too weak. 50980 trivial. 0 not checked. [2018-12-02 18:53:14,601 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 76182 backedges. 6510 proven. 1326 refuted. 0 times theorem prover too weak. 68346 trivial. 0 not checked. [2018-12-02 18:53:16,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:16,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 17] total 25 [2018-12-02 18:53:16,794 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:16,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-02 18:53:16,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-02 18:53:16,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2018-12-02 18:53:16,796 INFO L87 Difference]: Start difference. First operand 104 states and 149 transitions. Second operand 18 states. [2018-12-02 18:53:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:17,083 INFO L93 Difference]: Finished difference Result 210 states and 334 transitions. [2018-12-02 18:53:17,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-02 18:53:17,083 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1131 [2018-12-02 18:53:17,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:17,085 INFO L225 Difference]: With dead ends: 210 [2018-12-02 18:53:17,085 INFO L226 Difference]: Without dead ends: 115 [2018-12-02 18:53:17,085 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2297 GetRequests, 2244 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2018-12-02 18:53:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-12-02 18:53:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2018-12-02 18:53:17,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-12-02 18:53:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2018-12-02 18:53:17,090 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 1131 [2018-12-02 18:53:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:17,091 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2018-12-02 18:53:17,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-02 18:53:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2018-12-02 18:53:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2018-12-02 18:53:17,095 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:17,095 INFO L402 BasicCegarLoop]: trace histogram [141, 141, 114, 70, 70, 70, 70, 70, 70, 70, 44, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:17,095 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:17,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:17,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1047200934, now seen corresponding path program 12 times [2018-12-02 18:53:17,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:17,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:17,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 18:53:17,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:17,096 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 6549 proven. 1650 refuted. 0 times theorem prover too weak. 47382 trivial. 0 not checked. [2018-12-02 18:53:17,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:17,511 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:17,511 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:17,511 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:17,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:17,511 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/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 [2018-12-02 18:53:17,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 18:53:17,517 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 18:53:17,612 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 18:53:17,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 18:53:17,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 28812 proven. 3686 refuted. 0 times theorem prover too weak. 23083 trivial. 0 not checked. [2018-12-02 18:53:17,883 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 55581 backedges. 2305 proven. 8202 refuted. 0 times theorem prover too weak. 45074 trivial. 0 not checked. [2018-12-02 18:53:21,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:21,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 30] total 37 [2018-12-02 18:53:21,322 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:21,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-02 18:53:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-02 18:53:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2018-12-02 18:53:21,323 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand 23 states. [2018-12-02 18:53:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:21,732 INFO L93 Difference]: Finished difference Result 212 states and 364 transitions. [2018-12-02 18:53:21,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-02 18:53:21,732 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 968 [2018-12-02 18:53:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:21,734 INFO L225 Difference]: With dead ends: 212 [2018-12-02 18:53:21,734 INFO L226 Difference]: Without dead ends: 124 [2018-12-02 18:53:21,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1982 GetRequests, 1897 SyntacticMatches, 28 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=841, Invalid=2581, Unknown=0, NotChecked=0, Total=3422 [2018-12-02 18:53:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-12-02 18:53:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2018-12-02 18:53:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-02 18:53:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 148 transitions. [2018-12-02 18:53:21,744 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 148 transitions. Word has length 968 [2018-12-02 18:53:21,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:21,744 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 148 transitions. [2018-12-02 18:53:21,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-02 18:53:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 148 transitions. [2018-12-02 18:53:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2018-12-02 18:53:21,750 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:21,750 INFO L402 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 18:53:21,750 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:21,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:21,751 INFO L82 PathProgramCache]: Analyzing trace with hash -622714639, now seen corresponding path program 13 times [2018-12-02 18:53:21,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:21,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:21,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 18:53:21,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:21,752 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 3648 proven. 6545 refuted. 0 times theorem prover too weak. 40717 trivial. 0 not checked. [2018-12-02 18:53:22,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:22,181 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:22,182 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:22,182 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:22,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:22,182 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 18:53:22,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:22,188 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 18:53:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:22,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 3566 proven. 7262 refuted. 0 times theorem prover too weak. 40082 trivial. 0 not checked. [2018-12-02 18:53:22,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 3560 proven. 7396 refuted. 0 times theorem prover too weak. 39954 trivial. 0 not checked. [2018-12-02 18:53:25,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:53:25,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 34] total 40 [2018-12-02 18:53:25,961 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:53:25,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-02 18:53:25,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-02 18:53:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2018-12-02 18:53:25,962 INFO L87 Difference]: Start difference. First operand 105 states and 148 transitions. Second operand 24 states. [2018-12-02 18:53:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:53:26,567 INFO L93 Difference]: Finished difference Result 233 states and 386 transitions. [2018-12-02 18:53:26,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-12-02 18:53:26,567 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 927 [2018-12-02 18:53:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:53:26,569 INFO L225 Difference]: With dead ends: 233 [2018-12-02 18:53:26,569 INFO L226 Difference]: Without dead ends: 137 [2018-12-02 18:53:26,570 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1921 GetRequests, 1816 SyntacticMatches, 32 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1341, Invalid=4209, Unknown=0, NotChecked=0, Total=5550 [2018-12-02 18:53:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-12-02 18:53:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2018-12-02 18:53:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-12-02 18:53:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 186 transitions. [2018-12-02 18:53:26,575 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 186 transitions. Word has length 927 [2018-12-02 18:53:26,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:53:26,575 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 186 transitions. [2018-12-02 18:53:26,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-02 18:53:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 186 transitions. [2018-12-02 18:53:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2018-12-02 18:53:26,578 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 18:53:26,578 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, 1] [2018-12-02 18:53:26,578 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 18:53:26,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 18:53:26,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 14 times [2018-12-02 18:53:26,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 18:53:26,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:26,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 18:53:26,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 18:53:26,579 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 18:53:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 18:53:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-12-02 18:53:27,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:27,083 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 18:53:27,083 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 18:53:27,083 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 18:53:27,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 18:53:27,083 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 18:53:27,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 18:53:27,090 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 18:53:27,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-12-02 18:53:27,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 18:53:27,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 18:53:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-12-02 18:53:27,744 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 18:53:29,285 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:29,504 WARN L180 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:29,732 WARN L180 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:53:29,957 WARN L180 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:53:31,534 WARN L180 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-12-02 18:53:32,047 WARN L180 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-12-02 18:53:32,567 WARN L180 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-12-02 18:53:33,073 WARN L180 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-12-02 18:53:34,604 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:34,807 WARN L180 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:35,021 WARN L180 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:53:35,250 WARN L180 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:53:36,552 WARN L180 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 491 [2018-12-02 18:53:37,792 WARN L180 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 491 [2018-12-02 18:53:39,047 WARN L180 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 493 [2018-12-02 18:53:40,488 WARN L180 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 493 [2018-12-02 18:53:42,135 WARN L180 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:42,357 WARN L180 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:42,570 WARN L180 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:53:42,772 WARN L180 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:53:44,543 WARN L180 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2018-12-02 18:53:44,651 WARN L180 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2018-12-02 18:53:45,925 WARN L180 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2018-12-02 18:53:46,034 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2018-12-02 18:53:46,144 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2018-12-02 18:53:46,268 WARN L180 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2018-12-02 18:53:48,556 WARN L180 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:48,783 WARN L180 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:49,018 WARN L180 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:53:49,243 WARN L180 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:53:50,705 WARN L180 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-12-02 18:53:51,203 WARN L180 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-12-02 18:53:51,748 WARN L180 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-12-02 18:53:52,297 WARN L180 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-12-02 18:53:55,640 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-12-02 18:53:55,743 WARN L180 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-12-02 18:53:56,502 WARN L180 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:56,706 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-12-02 18:53:56,910 WARN L180 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:53:57,116 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-12-02 18:54:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-12-02 18:54:00,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-02 18:54:00,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2018-12-02 18:54:00,304 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 18:54:00,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-02 18:54:00,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-02 18:54:00,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-12-02 18:54:00,305 INFO L87 Difference]: Start difference. First operand 130 states and 186 transitions. Second operand 36 states. [2018-12-02 18:54:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 18:54:00,393 INFO L93 Difference]: Finished difference Result 131 states and 187 transitions. [2018-12-02 18:54:00,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-02 18:54:00,394 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2018-12-02 18:54:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 18:54:00,394 INFO L225 Difference]: With dead ends: 131 [2018-12-02 18:54:00,394 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 18:54:00,395 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1721 GetRequests, 1468 SyntacticMatches, 218 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5500 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2018-12-02 18:54:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 18:54:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 18:54:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 18:54:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 18:54:00,395 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2018-12-02 18:54:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 18:54:00,395 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 18:54:00,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-02 18:54:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 18:54:00,395 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 18:54:00,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-02 18:54:00,798 WARN L180 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 45 [2018-12-02 18:54:00,800 INFO L448 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-12-02 18:54:00,800 INFO L451 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-12-02 18:54:00,800 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 fibonacci_~n) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-12-02 18:54:00,800 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-12-02 18:54:00,800 INFO L444 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse3 (<= 8 |fibonacci_#in~n|)) (.cse2 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= 1 |fibonacci_#t~ret0|)) (.cse0 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6) (<= 6 fibonacci_~n) .cse0) (and .cse1 (<= |fibonacci_#in~n| 2) (<= 2 fibonacci_~n) .cse0) (and (<= |fibonacci_#in~n| 8) (<= 13 |fibonacci_#t~ret0|) .cse2 .cse3 .cse0) (and (<= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 5) (<= 5 fibonacci_~n) .cse0) (and (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7) (<= 7 fibonacci_~n) .cse0) (and (<= 21 |fibonacci_#t~ret0|) .cse2 .cse3 .cse0) (and (<= 4 |fibonacci_#in~n|) .cse2 (<= |fibonacci_#in~n| 4) (<= 2 |fibonacci_#t~ret0|) .cse0) (and (<= |fibonacci_#in~n| 3) .cse1 (<= 3 fibonacci_~n) .cse0))) [2018-12-02 18:54:00,800 INFO L448 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-12-02 18:54:00,800 INFO L448 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-12-02 18:54:00,800 INFO L448 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-02 18:54:00,801 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L451 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-12-02 18:54:00,801 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-12-02 18:54:00,801 INFO L448 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-12-02 18:54:00,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:54:00 BoogieIcfgContainer [2018-12-02 18:54:00,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 18:54:00,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 18:54:00,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 18:54:00,803 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 18:54:00,803 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:53:02" (3/4) ... [2018-12-02 18:54:00,805 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 18:54:00,809 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-12-02 18:54:00,809 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-02 18:54:00,810 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-02 18:54:00,812 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-02 18:54:00,812 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-02 18:54:00,812 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 18:54:00,835 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e11d5aa5-6ba8-43c4-8124-e03b2a4ebb48/bin-2019/utaipan/witness.graphml [2018-12-02 18:54:00,835 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 18:54:00,836 INFO L168 Benchmark]: Toolchain (without parser) took 58686.81 ms. Allocated memory was 1.0 GB in the beginning and 3.1 GB in the end (delta: 2.1 GB). Free memory was 952.4 MB in the beginning and 2.6 GB in the end (delta: -1.6 GB). Peak memory consumption was 447.6 MB. Max. memory is 11.5 GB. [2018-12-02 18:54:00,836 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 18:54:00,836 INFO L168 Benchmark]: CACSL2BoogieTranslator took 118.16 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 18:54:00,837 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.35 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 18:54:00,837 INFO L168 Benchmark]: Boogie Preprocessor took 10.01 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 18:54:00,837 INFO L168 Benchmark]: RCFGBuilder took 145.98 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -154.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2018-12-02 18:54:00,837 INFO L168 Benchmark]: TraceAbstraction took 58365.82 ms. Allocated memory was 1.1 GB in the beginning and 3.1 GB in the end (delta: 1.9 GB). Free memory was 1.1 GB in the beginning and 2.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 475.9 MB. Max. memory is 11.5 GB. [2018-12-02 18:54:00,837 INFO L168 Benchmark]: Witness Printer took 32.38 ms. Allocated memory is still 3.1 GB. Free memory is still 2.6 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 18:54:00,838 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 118.16 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.35 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.01 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 145.98 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 115.3 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -154.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 58365.82 ms. Allocated memory was 1.1 GB in the beginning and 3.1 GB in the end (delta: 1.9 GB). Free memory was 1.1 GB in the beginning and 2.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 475.9 MB. Max. memory is 11.5 GB. * Witness Printer took 32.38 ms. Allocated memory is still 3.1 GB. Free memory is still 2.6 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. SAFE Result, 58.3s OverallTime, 17 OverallIterations, 165 TraceHistogramMax, 3.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 455 SDtfs, 1005 SDslu, 1908 SDs, 0 SdLazy, 3274 SolverSat, 1057 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12405 GetRequests, 11539 SyntacticMatches, 393 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10354 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.9s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 81 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 329 PreInvPairs, 426 NumberOfFragments, 127 HoareAnnotationTreeSize, 329 FomulaSimplifications, 986 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2831 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 50.7s InterpolantComputationTime, 11845 NumberOfCodeBlocks, 10726 NumberOfCodeBlocksAsserted, 220 NumberOfCheckSat, 17706 ConstructedInterpolants, 0 QuantifiedInterpolants, 18312561 SizeOfPredicates, 114 NumberOfNonLiveVariables, 10492 ConjunctsInSsa, 424 ConjunctsInUnsatCore, 47 InterpolantComputations, 2 PerfectInterpolantSequences, 716783/793089 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...