./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/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 ceb806ae997f94b7f09b4e2dce31a0e63ff1a329 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 04:14:24,111 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 04:14:24,112 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 04:14:24,120 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 04:14:24,120 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 04:14:24,121 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 04:14:24,121 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 04:14:24,122 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 04:14:24,124 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 04:14:24,124 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 04:14:24,125 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 04:14:24,125 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 04:14:24,125 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 04:14:24,126 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 04:14:24,127 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 04:14:24,127 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 04:14:24,128 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 04:14:24,129 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 04:14:24,131 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 04:14:24,132 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 04:14:24,132 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 04:14:24,133 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 04:14:24,135 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 04:14:24,135 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 04:14:24,135 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 04:14:24,136 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 04:14:24,136 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 04:14:24,137 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 04:14:24,138 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 04:14:24,138 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 04:14:24,138 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 04:14:24,139 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 04:14:24,139 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 04:14:24,139 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 04:14:24,140 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 04:14:24,140 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 04:14:24,140 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 04:14:24,151 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 04:14:24,151 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 04:14:24,151 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 04:14:24,151 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 04:14:24,151 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 04:14:24,152 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 04:14:24,152 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 04:14:24,152 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 04:14:24,152 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 04:14:24,152 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 04:14:24,152 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 04:14:24,152 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 04:14:24,152 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 04:14:24,153 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 04:14:24,153 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 04:14:24,153 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 04:14:24,153 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 04:14:24,153 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 04:14:24,153 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 04:14:24,154 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 04:14:24,154 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 04:14:24,154 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 04:14:24,154 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 04:14:24,154 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 04:14:24,154 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 04:14:24,154 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 04:14:24,154 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 04:14:24,155 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 04:14:24,155 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 04:14:24,155 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 04:14:24,155 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 04:14:24,155 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 04:14:24,155 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 04:14:24,155 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 04:14:24,155 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 04:14:24,155 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 04:14:24,155 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_597e7c07-e51d-46fd-a18f-6a0379a6c764/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 -> ceb806ae997f94b7f09b4e2dce31a0e63ff1a329 [2018-12-03 04:14:24,178 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 04:14:24,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 04:14:24,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 04:14:24,188 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 04:14:24,188 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 04:14:24,189 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c [2018-12-03 04:14:24,228 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/data/432e5b7cb/23180c13dbe6457a82dc18ad21a98ffe/FLAG1207448fc [2018-12-03 04:14:24,625 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 04:14:24,625 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/sv-benchmarks/c/recursive-simple/id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c [2018-12-03 04:14:24,629 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/data/432e5b7cb/23180c13dbe6457a82dc18ad21a98ffe/FLAG1207448fc [2018-12-03 04:14:24,636 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/data/432e5b7cb/23180c13dbe6457a82dc18ad21a98ffe [2018-12-03 04:14:24,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 04:14:24,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 04:14:24,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 04:14:24,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 04:14:24,641 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 04:14:24,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51f0260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24, skipping insertion in model container [2018-12-03 04:14:24,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 04:14:24,657 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 04:14:24,741 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 04:14:24,743 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 04:14:24,752 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 04:14:24,759 INFO L195 MainTranslator]: Completed translation [2018-12-03 04:14:24,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24 WrapperNode [2018-12-03 04:14:24,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 04:14:24,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 04:14:24,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 04:14:24,760 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 04:14:24,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 04:14:24,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 04:14:24,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 04:14:24,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 04:14:24,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... [2018-12-03 04:14:24,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 04:14:24,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 04:14:24,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 04:14:24,783 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 04:14:24,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 04:14:24,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 04:14:24,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 04:14:24,846 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-12-03 04:14:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-12-03 04:14:24,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 04:14:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 04:14:24,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 04:14:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 04:14:24,846 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-03 04:14:24,846 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-03 04:14:24,940 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 04:14:24,940 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 04:14:24,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:14:24 BoogieIcfgContainer [2018-12-03 04:14:24,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 04:14:24,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 04:14:24,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 04:14:24,943 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 04:14:24,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 04:14:24" (1/3) ... [2018-12-03 04:14:24,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c85984f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 04:14:24, skipping insertion in model container [2018-12-03 04:14:24,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 04:14:24" (2/3) ... [2018-12-03 04:14:24,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c85984f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 04:14:24, skipping insertion in model container [2018-12-03 04:14:24,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:14:24" (3/3) ... [2018-12-03 04:14:24,945 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_b3_o5_true-unreach-call_true-termination_true-no-overflow.c [2018-12-03 04:14:24,951 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 04:14:24,956 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 04:14:24,968 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 04:14:24,994 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 04:14:24,995 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 04:14:24,995 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 04:14:24,995 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 04:14:24,995 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 04:14:24,995 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 04:14:24,995 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 04:14:24,995 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 04:14:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-12-03 04:14:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 04:14:25,012 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 04:14:25,013 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 04:14:25,014 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 04:14:25,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:25,019 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2018-12-03 04:14:25,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 04:14:25,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 04:14:25,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,050 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 04:14:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 04:14:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 04:14:25,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 04:14:25,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 04:14:25,158 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 04:14:25,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 04:14:25,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 04:14:25,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:25,169 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2018-12-03 04:14:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 04:14:25,201 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2018-12-03 04:14:25,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 04:14:25,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-03 04:14:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 04:14:25,208 INFO L225 Difference]: With dead ends: 40 [2018-12-03 04:14:25,208 INFO L226 Difference]: Without dead ends: 26 [2018-12-03 04:14:25,210 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:25,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-03 04:14:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-03 04:14:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-03 04:14:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-12-03 04:14:25,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2018-12-03 04:14:25,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 04:14:25,235 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-12-03 04:14:25,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 04:14:25,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-12-03 04:14:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 04:14:25,236 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 04:14:25,236 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 04:14:25,236 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 04:14:25,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:25,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2018-12-03 04:14:25,237 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 04:14:25,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 04:14:25,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,238 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 04:14:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 04:14:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 04:14:25,291 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 04:14:25,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 04:14:25,292 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 04:14:25,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 04:14:25,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 04:14:25,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:25,293 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-12-03 04:14:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 04:14:25,306 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-12-03 04:14:25,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 04:14:25,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-12-03 04:14:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 04:14:25,307 INFO L225 Difference]: With dead ends: 44 [2018-12-03 04:14:25,307 INFO L226 Difference]: Without dead ends: 32 [2018-12-03 04:14:25,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-03 04:14:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-03 04:14:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 04:14:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-12-03 04:14:25,312 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-12-03 04:14:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 04:14:25,312 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-03 04:14:25,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 04:14:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-12-03 04:14:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-12-03 04:14:25,313 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 04:14:25,313 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 04:14:25,313 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 04:14:25,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2018-12-03 04:14:25,313 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 04:14:25,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 04:14:25,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,314 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 04:14:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 04:14:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 04:14:25,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 04:14:25,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-03 04:14:25,384 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 04:14:25,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-03 04:14:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-03 04:14:25,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-03 04:14:25,385 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2018-12-03 04:14:25,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 04:14:25,411 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-12-03 04:14:25,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-03 04:14:25,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-12-03 04:14:25,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 04:14:25,412 INFO L225 Difference]: With dead ends: 36 [2018-12-03 04:14:25,412 INFO L226 Difference]: Without dead ends: 32 [2018-12-03 04:14:25,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-03 04:14:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-03 04:14:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-03 04:14:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 04:14:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-12-03 04:14:25,416 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2018-12-03 04:14:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 04:14:25,416 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-03 04:14:25,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-03 04:14:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-12-03 04:14:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-03 04:14:25,416 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 04:14:25,417 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 04:14:25,417 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 04:14:25,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1423155149, now seen corresponding path program 1 times [2018-12-03 04:14:25,417 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 04:14:25,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 04:14:25,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,418 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 04:14:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 04:14:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 04:14:25,459 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 04:14:25,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 04:14:25,459 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 04:14:25,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 04:14:25,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 04:14:25,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:25,460 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2018-12-03 04:14:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 04:14:25,472 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2018-12-03 04:14:25,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 04:14:25,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-12-03 04:14:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 04:14:25,473 INFO L225 Difference]: With dead ends: 48 [2018-12-03 04:14:25,473 INFO L226 Difference]: Without dead ends: 36 [2018-12-03 04:14:25,474 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-03 04:14:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-12-03 04:14:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 04:14:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-03 04:14:25,478 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-12-03 04:14:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 04:14:25,479 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-03 04:14:25,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 04:14:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-03 04:14:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-03 04:14:25,479 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 04:14:25,479 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 04:14:25,480 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 04:14:25,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1226641644, now seen corresponding path program 1 times [2018-12-03 04:14:25,480 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 04:14:25,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 04:14:25,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,481 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 04:14:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 04:14:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 04:14:25,530 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 04:14:25,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 04:14:25,530 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 04:14:25,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 04:14:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 04:14:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:25,531 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2018-12-03 04:14:25,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 04:14:25,537 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-12-03 04:14:25,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 04:14:25,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-12-03 04:14:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 04:14:25,538 INFO L225 Difference]: With dead ends: 40 [2018-12-03 04:14:25,538 INFO L226 Difference]: Without dead ends: 36 [2018-12-03 04:14:25,538 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-03 04:14:25,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2018-12-03 04:14:25,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-03 04:14:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-12-03 04:14:25,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2018-12-03 04:14:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 04:14:25,542 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-12-03 04:14:25,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 04:14:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-12-03 04:14:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-03 04:14:25,542 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 04:14:25,542 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 04:14:25,542 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 04:14:25,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:25,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2018-12-03 04:14:25,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 04:14:25,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 04:14:25,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:25,544 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 04:14:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 04:14:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-03 04:14:25,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 04:14:25,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 04:14:25,627 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-12-03 04:14:25,628 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [11], [12], [16], [18], [21], [23], [29], [32], [33], [35], [39], [40], [41], [42], [43], [44], [45], [47], [48], [49], [50] [2018-12-03 04:14:25,649 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 04:14:25,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 04:14:25,759 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 04:14:25,760 INFO L272 AbstractInterpreter]: Visited 24 different actions 56 times. Merged at 10 different actions 12 times. Never widened. Performed 100 root evaluator evaluations with a maximum evaluation depth of 4. Performed 100 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 5 variables. [2018-12-03 04:14:25,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:25,765 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 04:14:25,805 INFO L227 lantSequenceWeakener]: Weakened 10 states. On average, predicates are now at 60% of their original sizes. [2018-12-03 04:14:25,805 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 04:14:25,867 INFO L418 sIntCurrentIteration]: We unified 26 AI predicates to 26 [2018-12-03 04:14:25,867 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 04:14:25,868 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 04:14:25,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2018-12-03 04:14:25,868 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 04:14:25,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 04:14:25,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 04:14:25,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-12-03 04:14:25,869 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 12 states. [2018-12-03 04:14:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 04:14:26,060 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2018-12-03 04:14:26,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 04:14:26,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-12-03 04:14:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 04:14:26,060 INFO L225 Difference]: With dead ends: 62 [2018-12-03 04:14:26,061 INFO L226 Difference]: Without dead ends: 46 [2018-12-03 04:14:26,061 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2018-12-03 04:14:26,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-12-03 04:14:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2018-12-03 04:14:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-03 04:14:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2018-12-03 04:14:26,064 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 27 [2018-12-03 04:14:26,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 04:14:26,064 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2018-12-03 04:14:26,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 04:14:26,065 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2018-12-03 04:14:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-03 04:14:26,065 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 04:14:26,065 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 04:14:26,065 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 04:14:26,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:26,066 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2018-12-03 04:14:26,066 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 04:14:26,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:26,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 04:14:26,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:26,066 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 04:14:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 04:14:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-03 04:14:26,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 04:14:26,205 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 04:14:26,205 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2018-12-03 04:14:26,205 INFO L205 CegarAbsIntRunner]: [0], [1], [4], [5], [7], [11], [12], [16], [18], [21], [23], [29], [33], [35], [39], [40], [41], [42], [43], [44], [45], [47], [48], [49], [50] [2018-12-03 04:14:26,206 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 04:14:26,206 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 04:14:26,223 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 04:14:26,223 INFO L272 AbstractInterpreter]: Visited 24 different actions 47 times. Merged at 8 different actions 8 times. Never widened. Performed 81 root evaluator evaluations with a maximum evaluation depth of 4. Performed 81 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-12-03 04:14:26,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:26,225 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 04:14:26,244 INFO L227 lantSequenceWeakener]: Weakened 14 states. On average, predicates are now at 57.14% of their original sizes. [2018-12-03 04:14:26,244 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 04:14:26,308 INFO L418 sIntCurrentIteration]: We unified 33 AI predicates to 33 [2018-12-03 04:14:26,308 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 04:14:26,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 04:14:26,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [14] total 28 [2018-12-03 04:14:26,309 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 04:14:26,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-03 04:14:26,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-03 04:14:26,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-12-03 04:14:26,309 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 16 states. [2018-12-03 04:14:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 04:14:26,517 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2018-12-03 04:14:26,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 04:14:26,518 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2018-12-03 04:14:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 04:14:26,518 INFO L225 Difference]: With dead ends: 74 [2018-12-03 04:14:26,518 INFO L226 Difference]: Without dead ends: 50 [2018-12-03 04:14:26,519 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2018-12-03 04:14:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-03 04:14:26,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2018-12-03 04:14:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-03 04:14:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2018-12-03 04:14:26,522 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 34 [2018-12-03 04:14:26,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 04:14:26,522 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2018-12-03 04:14:26,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-03 04:14:26,522 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2018-12-03 04:14:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-03 04:14:26,523 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 04:14:26,523 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 04:14:26,523 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 04:14:26,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:26,523 INFO L82 PathProgramCache]: Analyzing trace with hash -292228316, now seen corresponding path program 1 times [2018-12-03 04:14:26,523 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 04:14:26,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:26,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 04:14:26,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:26,524 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 04:14:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 04:14:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-03 04:14:26,561 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 04:14:26,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 04:14:26,562 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 04:14:26,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 04:14:26,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 04:14:26,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:26,562 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 5 states. [2018-12-03 04:14:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 04:14:26,572 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2018-12-03 04:14:26,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 04:14:26,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2018-12-03 04:14:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 04:14:26,572 INFO L225 Difference]: With dead ends: 74 [2018-12-03 04:14:26,573 INFO L226 Difference]: Without dead ends: 38 [2018-12-03 04:14:26,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 04:14:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-03 04:14:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-12-03 04:14:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-03 04:14:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-12-03 04:14:26,576 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 41 [2018-12-03 04:14:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 04:14:26,576 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-12-03 04:14:26,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 04:14:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-12-03 04:14:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-03 04:14:26,576 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 04:14:26,576 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 04:14:26,577 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 04:14:26,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 04:14:26,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2018-12-03 04:14:26,577 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 04:14:26,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:26,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 04:14:26,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 04:14:26,578 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 04:14:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 04:14:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-12-03 04:14:26,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 04:14:26,688 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 04:14:26,688 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 04:14:26,688 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 04:14:26,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 04:14:26,689 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 04:14:26,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 04:14:26,697 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 04:14:26,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-03 04:14:26,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 04:14:26,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 04:14:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-12-03 04:14:26,773 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 04:14:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-12-03 04:14:26,882 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-03 04:14:26,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [14] total 20 [2018-12-03 04:14:26,883 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 04:14:26,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 04:14:26,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 04:14:26,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2018-12-03 04:14:26,883 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 5 states. [2018-12-03 04:14:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 04:14:26,887 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2018-12-03 04:14:26,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 04:14:26,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2018-12-03 04:14:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 04:14:26,887 INFO L225 Difference]: With dead ends: 38 [2018-12-03 04:14:26,888 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 04:14:26,888 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2018-12-03 04:14:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 04:14:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 04:14:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 04:14:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 04:14:26,889 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2018-12-03 04:14:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 04:14:26,889 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 04:14:26,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 04:14:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 04:14:26,889 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 04:14:26,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 04:14:26,908 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-03 04:14:26,909 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-03 04:14:26,909 INFO L448 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-12-03 04:14:26,909 INFO L444 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: (not (= id2_~x 0)) [2018-12-03 04:14:26,909 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-12-03 04:14:26,909 INFO L448 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2018-12-03 04:14:26,909 INFO L448 ceAbstractionStarter]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2018-12-03 04:14:26,909 INFO L451 ceAbstractionStarter]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2018-12-03 04:14:26,909 INFO L448 ceAbstractionStarter]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2018-12-03 04:14:26,909 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-03 04:14:26,909 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-03 04:14:26,909 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-03 04:14:26,909 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L451 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: true [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L444 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: (not (= id_~x 0)) [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L448 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2018-12-03 04:14:26,910 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2018-12-03 04:14:26,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 04:14:26 BoogieIcfgContainer [2018-12-03 04:14:26,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 04:14:26,912 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 04:14:26,912 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 04:14:26,912 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 04:14:26,913 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 04:14:24" (3/4) ... [2018-12-03 04:14:26,915 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 04:14:26,918 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 04:14:26,918 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2018-12-03 04:14:26,919 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 04:14:26,919 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-12-03 04:14:26,921 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-03 04:14:26,922 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-03 04:14:26,922 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 04:14:26,950 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_597e7c07-e51d-46fd-a18f-6a0379a6c764/bin-2019/utaipan/witness.graphml [2018-12-03 04:14:26,950 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 04:14:26,951 INFO L168 Benchmark]: Toolchain (without parser) took 2312.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 179.8 MB). Free memory was 952.4 MB in the beginning and 1.1 GB in the end (delta: -175.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 11.5 GB. [2018-12-03 04:14:26,952 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 04:14:26,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 120.61 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 940.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-03 04:14:26,953 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.41 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 04:14:26,953 INFO L168 Benchmark]: Boogie Preprocessor took 10.64 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 04:14:26,953 INFO L168 Benchmark]: RCFGBuilder took 157.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 88.1 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -126.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-03 04:14:26,954 INFO L168 Benchmark]: TraceAbstraction took 1971.45 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 91.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -69.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-12-03 04:14:26,954 INFO L168 Benchmark]: Witness Printer took 38.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 11.5 GB. [2018-12-03 04:14:26,956 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 120.61 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 940.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.41 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.64 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 157.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 88.1 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -126.7 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1971.45 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 91.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -69.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * Witness Printer took 38.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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 5 procedures, 28 locations, 1 error locations. SAFE Result, 1.9s OverallTime, 9 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 260 SDtfs, 44 SDslu, 1332 SDs, 0 SdLazy, 95 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 219 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 2 AbstIntStrong, 0.7542372881355932 AbsIntWeakeningRatio, 0.6271186440677966 AbsIntAvgWeakeningVarsNumRemoved, 0.1694915254237288 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 20 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 15 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 305 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 342 ConstructedInterpolants, 0 QuantifiedInterpolants, 27948 SizeOfPredicates, 3 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 137/153 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...