./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 0.1.23-5842f4b [2018-11-18 10:43:46,085 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:43:46,086 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:43:46,092 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:43:46,092 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:43:46,093 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:43:46,093 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:43:46,094 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:43:46,096 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:43:46,096 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:43:46,097 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:43:46,097 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:43:46,098 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:43:46,098 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:43:46,099 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:43:46,100 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:43:46,100 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:43:46,102 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:43:46,103 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:43:46,104 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:43:46,105 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:43:46,106 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:43:46,108 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:43:46,108 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:43:46,108 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:43:46,109 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:43:46,109 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:43:46,111 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:43:46,111 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:43:46,112 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:43:46,112 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:43:46,113 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:43:46,113 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:43:46,113 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:43:46,114 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:43:46,114 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:43:46,114 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 10:43:46,125 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:43:46,125 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:43:46,126 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:43:46,126 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 10:43:46,126 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 10:43:46,126 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 10:43:46,126 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 10:43:46,126 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 10:43:46,127 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 10:43:46,127 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 10:43:46,127 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 10:43:46,127 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 10:43:46,127 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 10:43:46,128 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:43:46,128 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:43:46,128 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:43:46,128 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:43:46,128 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:43:46,128 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:43:46,129 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:43:46,129 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:43:46,129 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:43:46,129 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:43:46,129 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:43:46,129 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:43:46,129 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:43:46,130 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:43:46,130 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:43:46,130 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:43:46,130 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:43:46,130 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:43:46,130 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:43:46,131 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:43:46,131 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 10:43:46,131 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:43:46,131 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:43:46,131 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 10:43:46,131 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_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:46,156 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:43:46,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:43:46,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:43:46,169 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:43:46,169 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:43:46,170 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 10:43:46,210 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/data/aa28aa989/5fe9d6be75de4d20ac05c38a8d4fbf2e/FLAGce7e20cd8 [2018-11-18 10:43:46,619 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:43:46,620 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/sv-benchmarks/c/recursive/Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 10:43:46,624 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/data/aa28aa989/5fe9d6be75de4d20ac05c38a8d4fbf2e/FLAGce7e20cd8 [2018-11-18 10:43:46,633 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/data/aa28aa989/5fe9d6be75de4d20ac05c38a8d4fbf2e [2018-11-18 10:43:46,635 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:43:46,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 10:43:46,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:43:46,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:43:46,640 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:43:46,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75654020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46, skipping insertion in model container [2018-11-18 10:43:46,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:43:46,661 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:43:46,766 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:43:46,768 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:43:46,777 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:43:46,785 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:43:46,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46 WrapperNode [2018-11-18 10:43:46,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:43:46,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 10:43:46,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 10:43:46,786 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 10:43:46,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 10:43:46,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:43:46,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:43:46,798 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:43:46,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... [2018-11-18 10:43:46,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:43:46,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:43:46,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:43:46,809 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:43:46,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-18 10:43:46,877 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-18 10:43:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:43:46,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:43:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:43:46,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:43:46,878 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:43:46,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:43:46,974 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:43:46,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:43:46 BoogieIcfgContainer [2018-11-18 10:43:46,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:43:46,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:43:46,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:43:46,977 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:43:46,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:43:46" (1/3) ... [2018-11-18 10:43:46,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf20194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:43:46, skipping insertion in model container [2018-11-18 10:43:46,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:43:46" (2/3) ... [2018-11-18 10:43:46,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf20194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:43:46, skipping insertion in model container [2018-11-18 10:43:46,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:43:46" (3/3) ... [2018-11-18 10:43:46,979 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci03_true-unreach-call_true-no-overflow_true-termination.c [2018-11-18 10:43:46,985 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:43:46,989 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:43:47,000 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:43:47,026 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:43:47,026 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:43:47,026 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:43:47,026 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:43:47,026 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:43:47,026 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:43:47,027 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:43:47,027 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:43:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-18 10:43:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 10:43:47,043 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:47,043 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:43:47,045 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:47,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:47,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2018-11-18 10:43:47,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:47,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:47,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:47,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:47,089 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:43:47,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:43:47,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:43:47,161 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:43:47,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:43:47,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:43:47,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:43:47,177 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2018-11-18 10:43:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:47,257 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2018-11-18 10:43:47,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:43:47,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 10:43:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:47,264 INFO L225 Difference]: With dead ends: 36 [2018-11-18 10:43:47,264 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 10:43:47,266 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:43:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 10:43:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-18 10:43:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 10:43:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-18 10:43:47,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2018-11-18 10:43:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:47,291 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-18 10:43:47,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:43:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-18 10:43:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-18 10:43:47,293 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:47,293 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:43:47,293 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:47,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:47,294 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2018-11-18 10:43:47,294 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:47,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:47,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:47,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:47,295 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:43:47,336 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:43:47,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:43:47,336 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:43:47,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:43:47,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:43:47,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:43:47,338 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2018-11-18 10:43:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:47,417 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2018-11-18 10:43:47,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:43:47,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-18 10:43:47,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:47,419 INFO L225 Difference]: With dead ends: 28 [2018-11-18 10:43:47,419 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 10:43:47,420 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:43:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 10:43:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-11-18 10:43:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 10:43:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-11-18 10:43:47,425 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2018-11-18 10:43:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:47,426 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-11-18 10:43:47,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:43:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-11-18 10:43:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 10:43:47,427 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:47,427 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:43:47,428 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:47,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:47,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2018-11-18 10:43:47,428 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:47,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:47,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:47,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:47,429 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 10:43:47,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:47,483 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:47,484 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-18 10:43:47,486 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [8], [10], [12], [13], [14], [18], [22], [24], [28], [30], [33], [34], [35], [36], [37], [38], [39], [41], [42] [2018-11-18 10:43:47,511 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:43:47,511 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:43:47,696 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:43:47,697 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. [2018-11-18 10:43:47,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:47,704 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:43:47,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:47,704 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:47,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:47,712 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:43:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:47,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 10:43:47,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 10:43:47,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:47,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2018-11-18 10:43:47,935 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:47,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 10:43:47,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:43:47,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:43:47,936 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2018-11-18 10:43:48,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:48,051 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2018-11-18 10:43:48,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:43:48,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-11-18 10:43:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:48,052 INFO L225 Difference]: With dead ends: 39 [2018-11-18 10:43:48,052 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 10:43:48,053 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-11-18 10:43:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 10:43:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 10:43:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 10:43:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2018-11-18 10:43:48,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2018-11-18 10:43:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:48,056 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2018-11-18 10:43:48,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 10:43:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2018-11-18 10:43:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-18 10:43:48,057 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:48,057 INFO L375 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] [2018-11-18 10:43:48,057 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:48,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:48,058 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2018-11-18 10:43:48,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:48,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:48,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:48,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:48,060 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 10:43:48,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:48,106 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:48,106 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-11-18 10:43:48,106 INFO L202 CegarAbsIntRunner]: [0], [3], [4], [7], [8], [10], [12], [13], [14], [18], [22], [24], [28], [30], [33], [34], [35], [36], [37], [38], [39], [41], [42] [2018-11-18 10:43:48,110 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:43:48,110 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:43:49,165 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:43:49,165 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. [2018-11-18 10:43:49,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:49,172 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:43:49,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:49,172 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:49,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:49,188 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:43:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:49,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 10:43:49,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 10:43:49,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:49,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2018-11-18 10:43:49,368 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:49,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 10:43:49,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:43:49,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:43:49,369 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2018-11-18 10:43:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:49,442 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2018-11-18 10:43:49,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 10:43:49,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-11-18 10:43:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:49,444 INFO L225 Difference]: With dead ends: 33 [2018-11-18 10:43:49,444 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 10:43:49,445 INFO L604 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 [2018-11-18 10:43:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 10:43:49,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-18 10:43:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 10:43:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-11-18 10:43:49,452 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2018-11-18 10:43:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:49,452 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-11-18 10:43:49,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 10:43:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-11-18 10:43:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-18 10:43:49,453 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:49,453 INFO L375 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] [2018-11-18 10:43:49,455 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:49,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:49,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2018-11-18 10:43:49,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:49,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:49,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:49,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:49,456 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 10:43:49,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:49,506 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:49,506 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:43:49,506 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:43:49,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:49,506 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:49,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:43:49,516 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 10:43:49,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 10:43:49,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:43:49,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 10:43:49,537 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 10:43:49,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:49,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2018-11-18 10:43:49,714 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:49,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 10:43:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:43:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:43:49,715 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 6 states. [2018-11-18 10:43:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:49,753 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2018-11-18 10:43:49,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 10:43:49,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2018-11-18 10:43:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:49,755 INFO L225 Difference]: With dead ends: 39 [2018-11-18 10:43:49,756 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 10:43:49,756 INFO L604 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 [2018-11-18 10:43:49,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 10:43:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2018-11-18 10:43:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 10:43:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2018-11-18 10:43:49,763 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 41 [2018-11-18 10:43:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:49,763 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2018-11-18 10:43:49,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 10:43:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2018-11-18 10:43:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 10:43:49,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:49,764 INFO L375 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] [2018-11-18 10:43:49,764 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:49,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:49,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2018-11-18 10:43:49,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:49,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:49,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:43:49,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:49,768 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-11-18 10:43:49,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:49,818 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:49,818 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:43:49,818 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:43:49,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:49,818 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:49,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:43:49,843 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 10:43:49,854 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:43:49,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:43:49,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 10:43:49,873 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-18 10:43:50,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:50,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 12 [2018-11-18 10:43:50,075 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:50,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 10:43:50,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 10:43:50,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:43:50,076 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 7 states. [2018-11-18 10:43:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:50,133 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2018-11-18 10:43:50,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:43:50,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2018-11-18 10:43:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:50,135 INFO L225 Difference]: With dead ends: 41 [2018-11-18 10:43:50,135 INFO L226 Difference]: Without dead ends: 37 [2018-11-18 10:43:50,137 INFO L604 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 [2018-11-18 10:43:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-18 10:43:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-11-18 10:43:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-18 10:43:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2018-11-18 10:43:50,143 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 42 [2018-11-18 10:43:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:50,144 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2018-11-18 10:43:50,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 10:43:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2018-11-18 10:43:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-18 10:43:50,145 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:50,146 INFO L375 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] [2018-11-18 10:43:50,146 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:50,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:50,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1539529542, now seen corresponding path program 4 times [2018-11-18 10:43:50,146 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:50,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:50,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:43:50,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:50,147 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 47 proven. 43 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-11-18 10:43:50,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:50,224 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:50,224 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:43:50,224 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:43:50,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:50,225 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:50,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:50,232 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:43:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:50,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-18 10:43:50,296 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 99 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-18 10:43:50,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:50,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2018-11-18 10:43:50,593 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:50,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 10:43:50,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 10:43:50,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2018-11-18 10:43:50,594 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand 14 states. [2018-11-18 10:43:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:50,881 INFO L93 Difference]: Finished difference Result 80 states and 135 transitions. [2018-11-18 10:43:50,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-18 10:43:50,882 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2018-11-18 10:43:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:50,886 INFO L225 Difference]: With dead ends: 80 [2018-11-18 10:43:50,886 INFO L226 Difference]: Without dead ends: 51 [2018-11-18 10:43:50,887 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 10:43:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-18 10:43:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2018-11-18 10:43:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 10:43:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2018-11-18 10:43:50,893 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 68 [2018-11-18 10:43:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:50,893 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2018-11-18 10:43:50,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 10:43:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2018-11-18 10:43:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-18 10:43:50,896 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:50,896 INFO L375 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] [2018-11-18 10:43:50,896 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:50,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash 946234379, now seen corresponding path program 5 times [2018-11-18 10:43:50,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:50,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:50,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:50,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:50,898 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 174 proven. 59 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2018-11-18 10:43:50,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:50,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:50,971 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:43:50,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:43:50,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:50,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:50,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:43:50,977 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 10:43:50,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-18 10:43:50,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:43:50,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 41 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-11-18 10:43:51,009 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 50 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-11-18 10:43:51,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:51,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 13 [2018-11-18 10:43:51,228 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:51,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 10:43:51,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:43:51,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-18 10:43:51,229 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 8 states. [2018-11-18 10:43:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:51,283 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2018-11-18 10:43:51,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:43:51,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2018-11-18 10:43:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:51,290 INFO L225 Difference]: With dead ends: 56 [2018-11-18 10:43:51,290 INFO L226 Difference]: Without dead ends: 52 [2018-11-18 10:43:51,291 INFO L604 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 [2018-11-18 10:43:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-18 10:43:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2018-11-18 10:43:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 10:43:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2018-11-18 10:43:51,295 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 110 [2018-11-18 10:43:51,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:51,296 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2018-11-18 10:43:51,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 10:43:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2018-11-18 10:43:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-18 10:43:51,297 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:51,298 INFO L375 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] [2018-11-18 10:43:51,298 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:51,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:51,298 INFO L82 PathProgramCache]: Analyzing trace with hash 551748881, now seen corresponding path program 6 times [2018-11-18 10:43:51,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:51,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:51,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:43:51,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:51,299 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 76 proven. 241 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-11-18 10:43:51,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:51,377 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:51,377 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:43:51,377 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:43:51,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:51,377 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:51,386 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:43:51,386 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 10:43:51,413 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:43:51,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:43:51,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 189 proven. 343 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2018-11-18 10:43:51,494 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 365 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2018-11-18 10:43:52,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:52,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 18] total 23 [2018-11-18 10:43:52,095 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:52,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 10:43:52,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 10:43:52,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2018-11-18 10:43:52,095 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 15 states. [2018-11-18 10:43:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:52,335 INFO L93 Difference]: Finished difference Result 112 states and 178 transitions. [2018-11-18 10:43:52,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-18 10:43:52,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 137 [2018-11-18 10:43:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:52,337 INFO L225 Difference]: With dead ends: 112 [2018-11-18 10:43:52,337 INFO L226 Difference]: Without dead ends: 67 [2018-11-18 10:43:52,338 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 248 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2018-11-18 10:43:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-11-18 10:43:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-11-18 10:43:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-18 10:43:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2018-11-18 10:43:52,345 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 137 [2018-11-18 10:43:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:52,345 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2018-11-18 10:43:52,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 10:43:52,345 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2018-11-18 10:43:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-18 10:43:52,347 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:52,347 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:43:52,347 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:52,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:52,347 INFO L82 PathProgramCache]: Analyzing trace with hash 375112636, now seen corresponding path program 7 times [2018-11-18 10:43:52,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:52,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:52,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:43:52,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:52,348 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 328 proven. 115 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2018-11-18 10:43:52,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:52,416 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:52,416 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:43:52,416 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:43:52,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:52,416 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:52,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:52,427 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:43:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:52,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2018-11-18 10:43:52,489 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2018-11-18 10:43:53,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:53,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 15] total 18 [2018-11-18 10:43:53,142 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:53,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 10:43:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 10:43:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-11-18 10:43:53,142 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 10 states. [2018-11-18 10:43:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:53,211 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2018-11-18 10:43:53,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 10:43:53,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 178 [2018-11-18 10:43:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:53,212 INFO L225 Difference]: With dead ends: 72 [2018-11-18 10:43:53,212 INFO L226 Difference]: Without dead ends: 68 [2018-11-18 10:43:53,212 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 339 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2018-11-18 10:43:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-18 10:43:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-18 10:43:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-18 10:43:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2018-11-18 10:43:53,219 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 178 [2018-11-18 10:43:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:53,219 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2018-11-18 10:43:53,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 10:43:53,219 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2018-11-18 10:43:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2018-11-18 10:43:53,223 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:53,224 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 43, 26, 26, 26, 26, 26, 26, 26, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:43:53,224 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:53,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:53,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1403859570, now seen corresponding path program 8 times [2018-11-18 10:43:53,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:53,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:53,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:53,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:53,225 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 274 proven. 1274 refuted. 0 times theorem prover too weak. 6167 trivial. 0 not checked. [2018-11-18 10:43:53,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:53,402 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:53,402 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:43:53,402 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:43:53,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:53,402 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:53,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:43:53,413 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 10:43:53,485 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-18 10:43:53,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:43:53,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 1374 proven. 123 refuted. 0 times theorem prover too weak. 6218 trivial. 0 not checked. [2018-11-18 10:43:53,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7715 backedges. 1374 proven. 134 refuted. 0 times theorem prover too weak. 6207 trivial. 0 not checked. [2018-11-18 10:43:54,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:54,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 20 [2018-11-18 10:43:54,299 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:54,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 10:43:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 10:43:54,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2018-11-18 10:43:54,300 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 15 states. [2018-11-18 10:43:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:54,710 INFO L93 Difference]: Finished difference Result 178 states and 305 transitions. [2018-11-18 10:43:54,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-18 10:43:54,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 369 [2018-11-18 10:43:54,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:54,712 INFO L225 Difference]: With dead ends: 178 [2018-11-18 10:43:54,712 INFO L226 Difference]: Without dead ends: 111 [2018-11-18 10:43:54,713 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 723 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 10:43:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-18 10:43:54,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2018-11-18 10:43:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-18 10:43:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2018-11-18 10:43:54,724 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 369 [2018-11-18 10:43:54,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:54,725 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2018-11-18 10:43:54,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 10:43:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2018-11-18 10:43:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-11-18 10:43:54,733 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:54,733 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:43:54,733 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:54,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:54,735 INFO L82 PathProgramCache]: Analyzing trace with hash -211711407, now seen corresponding path program 9 times [2018-11-18 10:43:54,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:54,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:54,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:43:54,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:54,736 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 1412 proven. 592 refuted. 0 times theorem prover too weak. 10383 trivial. 0 not checked. [2018-11-18 10:43:54,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:54,948 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:54,948 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:43:54,949 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:43:54,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:54,949 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:54,957 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:43:54,957 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 10:43:55,018 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:43:55,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:43:55,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2018-11-18 10:43:55,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:43:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2347 refuted. 0 times theorem prover too weak. 9679 trivial. 0 not checked. [2018-11-18 10:43:56,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:43:56,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 19] total 20 [2018-11-18 10:43:56,662 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:43:56,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 10:43:56,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 10:43:56,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-11-18 10:43:56,663 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 12 states. [2018-11-18 10:43:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:43:56,758 INFO L93 Difference]: Finished difference Result 114 states and 178 transitions. [2018-11-18 10:43:56,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 10:43:56,758 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 464 [2018-11-18 10:43:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:43:56,760 INFO L225 Difference]: With dead ends: 114 [2018-11-18 10:43:56,760 INFO L226 Difference]: Without dead ends: 110 [2018-11-18 10:43:56,761 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 950 GetRequests, 907 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2018-11-18 10:43:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-11-18 10:43:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2018-11-18 10:43:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-11-18 10:43:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 166 transitions. [2018-11-18 10:43:56,771 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 166 transitions. Word has length 464 [2018-11-18 10:43:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:43:56,772 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 166 transitions. [2018-11-18 10:43:56,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 10:43:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 166 transitions. [2018-11-18 10:43:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2018-11-18 10:43:56,777 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:43:56,777 INFO L375 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] [2018-11-18 10:43:56,777 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:43:56,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:43:56,778 INFO L82 PathProgramCache]: Analyzing trace with hash -622714639, now seen corresponding path program 10 times [2018-11-18 10:43:56,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:43:56,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:56,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:43:56,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:43:56,779 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:43:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 3648 proven. 6545 refuted. 0 times theorem prover too weak. 40717 trivial. 0 not checked. [2018-11-18 10:43:57,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:57,294 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:43:57,294 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:43:57,295 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:43:57,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:43:57,295 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:43:57,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:43:57,303 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:43:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:43:57,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:43:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 3566 proven. 7262 refuted. 0 times theorem prover too weak. 40082 trivial. 0 not checked. [2018-11-18 10:43:57,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:44:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 50910 backedges. 3560 proven. 7396 refuted. 0 times theorem prover too weak. 39954 trivial. 0 not checked. [2018-11-18 10:44:01,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:44:01,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 34] total 40 [2018-11-18 10:44:01,331 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:44:01,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 10:44:01,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 10:44:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2018-11-18 10:44:01,332 INFO L87 Difference]: Start difference. First operand 107 states and 166 transitions. Second operand 24 states. [2018-11-18 10:44:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:44:01,974 INFO L93 Difference]: Finished difference Result 270 states and 602 transitions. [2018-11-18 10:44:01,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-18 10:44:01,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 927 [2018-11-18 10:44:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:44:01,977 INFO L225 Difference]: With dead ends: 270 [2018-11-18 10:44:01,977 INFO L226 Difference]: Without dead ends: 170 [2018-11-18 10:44:01,979 INFO L604 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 [2018-11-18 10:44:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-11-18 10:44:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 128. [2018-11-18 10:44:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-11-18 10:44:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2018-11-18 10:44:01,991 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 927 [2018-11-18 10:44:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:44:01,992 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2018-11-18 10:44:01,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 10:44:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2018-11-18 10:44:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2018-11-18 10:44:01,997 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:44:01,997 INFO L375 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] [2018-11-18 10:44:01,997 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:44:01,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:44:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1020040988, now seen corresponding path program 11 times [2018-11-18 10:44:01,998 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:44:01,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:44:01,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:44:01,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:44:01,999 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:44:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:44:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-18 10:44:02,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:44:02,542 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:44:02,543 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:44:02,543 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:44:02,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:44:02,543 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/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 [2018-11-18 10:44:02,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:44:02,562 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 10:44:02,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 93 check-sat command(s) [2018-11-18 10:44:02,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:44:02,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:44:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-18 10:44:03,331 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:44:04,029 WARN L180 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-11-18 10:44:04,902 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:05,104 WARN L180 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:05,314 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:05,523 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:06,970 WARN L180 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-18 10:44:07,533 WARN L180 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-18 10:44:08,060 WARN L180 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-18 10:44:08,580 WARN L180 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-18 10:44:10,082 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:10,292 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:10,507 WARN L180 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:10,741 WARN L180 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:12,023 WARN L180 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 491 [2018-11-18 10:44:13,298 WARN L180 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 491 [2018-11-18 10:44:14,641 WARN L180 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 493 [2018-11-18 10:44:15,988 WARN L180 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 493 [2018-11-18 10:44:17,657 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:17,863 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:18,095 WARN L180 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:18,303 WARN L180 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:22,459 WARN L180 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2018-11-18 10:44:23,064 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:23,269 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:23,482 WARN L180 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:23,694 WARN L180 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:25,102 WARN L180 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-18 10:44:25,605 WARN L180 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2018-11-18 10:44:26,112 WARN L180 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-18 10:44:26,649 WARN L180 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2018-11-18 10:44:27,449 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-11-18 10:44:27,556 WARN L180 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2018-11-18 10:44:30,534 WARN L180 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:30,739 WARN L180 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2018-11-18 10:44:30,948 WARN L180 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:31,172 WARN L180 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2018-11-18 10:44:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 5957 proven. 4942 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2018-11-18 10:44:34,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:44:34,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2018-11-18 10:44:34,518 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:44:34,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-18 10:44:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-18 10:44:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2018-11-18 10:44:34,519 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand 36 states. [2018-11-18 10:44:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:44:34,638 INFO L93 Difference]: Finished difference Result 129 states and 187 transitions. [2018-11-18 10:44:34,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-18 10:44:34,639 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 750 [2018-11-18 10:44:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:44:34,640 INFO L225 Difference]: With dead ends: 129 [2018-11-18 10:44:34,640 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:44:34,641 INFO L604 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 [2018-11-18 10:44:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:44:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:44:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:44:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:44:34,642 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2018-11-18 10:44:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:44:34,642 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:44:34,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-18 10:44:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:44:34,642 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:44:34,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:44:34,666 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 10:44:34,691 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 10:44:34,736 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 10:44:34,747 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 10:44:34,752 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 10:44:34,922 WARN L180 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 7 [2018-11-18 10:44:35,283 WARN L180 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 44 [2018-11-18 10:44:35,285 INFO L425 ceAbstractionStarter]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2018-11-18 10:44:35,285 INFO L428 ceAbstractionStarter]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2018-11-18 10:44:35,285 INFO L421 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|)) [2018-11-18 10:44:35,285 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-18 10:44:35,285 INFO L421 ceAbstractionStarter]: At program point L20-2(line 20) the Hoare annotation is: (and (or (< |fibonacci_#in~n| 3) (<= 3 fibonacci_~n)) (<= 1 |fibonacci_#t~ret0|) (<= 2 fibonacci_~n) (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n))) (or (and (<= 21 |fibonacci_#t~ret0|) .cse0) (and .cse0 (<= 3 |fibonacci_#t~ret0|) (<= fibonacci_~n 5)) (and .cse0 (<= |fibonacci_#in~n| 4) (<= 2 |fibonacci_#t~ret0|)) (< |fibonacci_#in~n| 4) (and .cse0 (<= 8 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 7)) (and (<= 5 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 6) (<= 6 fibonacci_~n)) (and (<= 13 |fibonacci_#t~ret0|) .cse0 (<= |fibonacci_#in~n| 8)))) (<= fibonacci_~n |fibonacci_#in~n|)) [2018-11-18 10:44:35,285 INFO L425 ceAbstractionStarter]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2018-11-18 10:44:35,285 INFO L425 ceAbstractionStarter]: For program point L17(lines 17 21) no Hoare annotation was computed. [2018-11-18 10:44:35,285 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-18 10:44:35,285 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 21) no Hoare annotation was computed. [2018-11-18 10:44:35,285 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:44:35,285 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:44:35,285 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:44:35,285 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:44:35,285 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:44:35,286 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:44:35,286 INFO L425 ceAbstractionStarter]: For program point L31(lines 31 35) no Hoare annotation was computed. [2018-11-18 10:44:35,286 INFO L428 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: true [2018-11-18 10:44:35,286 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2018-11-18 10:44:35,286 INFO L425 ceAbstractionStarter]: For program point L30-1(line 30) no Hoare annotation was computed. [2018-11-18 10:44:35,286 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 29) no Hoare annotation was computed. [2018-11-18 10:44:35,286 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2018-11-18 10:44:35,286 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2018-11-18 10:44:35,286 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2018-11-18 10:44:35,286 INFO L425 ceAbstractionStarter]: For program point L34(line 34) no Hoare annotation was computed. [2018-11-18 10:44:35,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:44:35 BoogieIcfgContainer [2018-11-18 10:44:35,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:44:35,288 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:44:35,288 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:44:35,288 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:44:35,288 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:43:46" (3/4) ... [2018-11-18 10:44:35,291 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:44:35,294 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2018-11-18 10:44:35,294 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:44:35,295 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:44:35,297 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 10:44:35,297 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 10:44:35,297 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:44:35,320 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_637019f5-c76c-4d12-88d9-1d8334819ac9/bin-2019/utaipan/witness.graphml [2018-11-18 10:44:35,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:44:35,321 INFO L168 Benchmark]: Toolchain (without parser) took 48685.15 ms. Allocated memory was 1.0 GB in the beginning and 2.8 GB in the end (delta: 1.7 GB). Free memory was 962.5 MB in the beginning and 2.4 GB in the end (delta: -1.4 GB). Peak memory consumption was 300.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:44:35,321 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:44:35,321 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.18 ms. Allocated memory is still 1.0 GB. Free memory was 962.5 MB in the beginning and 951.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:44:35,322 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.34 ms. Allocated memory is still 1.0 GB. Free memory is still 951.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:44:35,322 INFO L168 Benchmark]: Boogie Preprocessor took 10.63 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 946.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 10:44:35,322 INFO L168 Benchmark]: RCFGBuilder took 165.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 946.4 MB in the beginning and 1.1 GB in the end (delta: -169.6 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2018-11-18 10:44:35,323 INFO L168 Benchmark]: TraceAbstraction took 48312.85 ms. Allocated memory was 1.2 GB in the beginning and 2.8 GB in the end (delta: 1.6 GB). Free memory was 1.1 GB in the beginning and 2.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 325.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:44:35,323 INFO L168 Benchmark]: Witness Printer took 32.48 ms. Allocated memory is still 2.8 GB. Free memory is still 2.4 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:44:35,324 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 982.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 149.18 ms. Allocated memory is still 1.0 GB. Free memory was 962.5 MB in the beginning and 951.8 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 11.34 ms. Allocated memory is still 1.0 GB. Free memory is still 951.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.63 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 946.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 165.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 128.5 MB). Free memory was 946.4 MB in the beginning and 1.1 GB in the end (delta: -169.6 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 48312.85 ms. Allocated memory was 1.2 GB in the beginning and 2.8 GB in the end (delta: 1.6 GB). Free memory was 1.1 GB in the beginning and 2.4 GB in the end (delta: -1.3 GB). Peak memory consumption was 325.7 MB. Max. memory is 11.5 GB. * Witness Printer took 32.48 ms. Allocated memory is still 2.8 GB. Free memory is still 2.4 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, 48.2s OverallTime, 14 OverallIterations, 135 TraceHistogramMax, 2.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 327 SDtfs, 570 SDslu, 1378 SDs, 0 SdLazy, 2130 SolverSat, 625 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6753 GetRequests, 6091 SyntacticMatches, 331 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8261 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 79 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 197 PreInvPairs, 316 NumberOfFragments, 97 HoareAnnotationTreeSize, 197 FomulaSimplifications, 2131 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3210 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 41.6s InterpolantComputationTime, 6311 NumberOfCodeBlocks, 6022 NumberOfCodeBlocksAsserted, 148 NumberOfCheckSat, 9414 ConstructedInterpolants, 0 QuantifiedInterpolants, 8853784 SizeOfPredicates, 79 NumberOfNonLiveVariables, 6347 ConjunctsInSsa, 358 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 277271/322710 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...