./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_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_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 11:33:19,383 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:33:19,385 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:33:19,393 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:33:19,394 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:33:19,394 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:33:19,395 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:33:19,397 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:33:19,398 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:33:19,398 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:33:19,399 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:33:19,399 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:33:19,400 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:33:19,401 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:33:19,401 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:33:19,402 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:33:19,403 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:33:19,404 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:33:19,405 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:33:19,407 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:33:19,407 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:33:19,408 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:33:19,410 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:33:19,410 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:33:19,410 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:33:19,411 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:33:19,412 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:33:19,412 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:33:19,413 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:33:19,414 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:33:19,414 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:33:19,414 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:33:19,414 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:33:19,415 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:33:19,415 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:33:19,416 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:33:19,416 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 11:33:19,426 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:33:19,427 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:33:19,427 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:33:19,427 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 11:33:19,428 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 11:33:19,428 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 11:33:19,428 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 11:33:19,428 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 11:33:19,428 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 11:33:19,428 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 11:33:19,428 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 11:33:19,428 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 11:33:19,429 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 11:33:19,429 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:33:19,429 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:33:19,429 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:33:19,430 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:33:19,430 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:33:19,430 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:33:19,430 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:33:19,430 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:33:19,430 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:33:19,430 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:33:19,430 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:33:19,431 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:33:19,431 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:33:19,431 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:33:19,431 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:33:19,431 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:33:19,431 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:33:19,431 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:33:19,432 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:33:19,432 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:33:19,432 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 11:33:19,432 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:33:19,432 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:33:19,432 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 11:33:19,432 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_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2018-11-18 11:33:19,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:33:19,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:33:19,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:33:19,464 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:33:19,464 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:33:19,465 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-11-18 11:33:19,504 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/data/1413e5842/04f9cb6aaccc4ea998773eea31146de5/FLAGb5eec8d03 [2018-11-18 11:33:19,902 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:33:19,902 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/sv-benchmarks/c/recursive-simple/id_i10_o10_true-unreach-call_true-termination.c [2018-11-18 11:33:19,906 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/data/1413e5842/04f9cb6aaccc4ea998773eea31146de5/FLAGb5eec8d03 [2018-11-18 11:33:19,916 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/data/1413e5842/04f9cb6aaccc4ea998773eea31146de5 [2018-11-18 11:33:19,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:33:19,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:33:19,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:33:19,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:33:19,921 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:33:19,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:33:19" (1/1) ... [2018-11-18 11:33:19,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e779c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:19, skipping insertion in model container [2018-11-18 11:33:19,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:33:19" (1/1) ... [2018-11-18 11:33:19,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:33:19,940 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:33:20,043 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:33:20,045 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:33:20,053 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:33:20,061 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:33:20,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20 WrapperNode [2018-11-18 11:33:20,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:33:20,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:33:20,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:33:20,062 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:33:20,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... [2018-11-18 11:33:20,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... [2018-11-18 11:33:20,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:33:20,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:33:20,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:33:20,074 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:33:20,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... [2018-11-18 11:33:20,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... [2018-11-18 11:33:20,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... [2018-11-18 11:33:20,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... [2018-11-18 11:33:20,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... [2018-11-18 11:33:20,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... [2018-11-18 11:33:20,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... [2018-11-18 11:33:20,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:33:20,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:33:20,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:33:20,084 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:33:20,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:33:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:33:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:33:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:33:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:33:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:33:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 11:33:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 11:33:20,241 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:33:20,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:33:20 BoogieIcfgContainer [2018-11-18 11:33:20,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:33:20,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:33:20,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:33:20,243 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:33:20,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:33:19" (1/3) ... [2018-11-18 11:33:20,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38013d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:33:20, skipping insertion in model container [2018-11-18 11:33:20,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:33:20" (2/3) ... [2018-11-18 11:33:20,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38013d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:33:20, skipping insertion in model container [2018-11-18 11:33:20,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:33:20" (3/3) ... [2018-11-18 11:33:20,245 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i10_o10_true-unreach-call_true-termination.c [2018-11-18 11:33:20,251 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:33:20,255 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:33:20,263 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:33:20,281 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:33:20,281 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:33:20,281 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:33:20,281 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:33:20,281 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:33:20,281 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:33:20,281 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:33:20,281 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:33:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 11:33:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 11:33:20,294 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:20,295 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:20,296 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:20,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2018-11-18 11:33:20,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:20,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:20,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:20,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:20,330 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:20,410 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 11:33:20,412 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:33:20,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 11:33:20,412 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:33:20,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 11:33:20,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:33:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 11:33:20,429 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-11-18 11:33:20,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:20,488 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 11:33:20,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:33:20,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 11:33:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:20,495 INFO L225 Difference]: With dead ends: 30 [2018-11-18 11:33:20,496 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 11:33:20,497 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 11:33:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 11:33:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 11:33:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 11:33:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-18 11:33:20,527 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-18 11:33:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:20,527 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-18 11:33:20,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 11:33:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-18 11:33:20,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 11:33:20,528 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:20,529 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:20,529 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:20,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:20,529 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2018-11-18 11:33:20,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:20,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:20,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:20,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:20,530 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:33:20,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:20,581 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:20,582 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-18 11:33:20,584 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [17], [20], [21], [23], [24], [25], [26], [27], [29], [30], [31], [32] [2018-11-18 11:33:20,606 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:33:20,607 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:33:20,720 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:33:20,721 INFO L272 AbstractInterpreter]: Visited 17 different actions 50 times. Never merged. Widened at 1 different actions 2 times. Performed 106 root evaluator evaluations with a maximum evaluation depth of 3. Performed 106 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 11:33:20,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:20,726 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:33:20,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:20,727 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:20,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:20,734 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:33:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:20,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 11:33:20,779 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:33:20,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:20,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2018-11-18 11:33:20,963 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:20,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 11:33:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 11:33:20,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-18 11:33:20,964 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-11-18 11:33:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:21,017 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-18 11:33:21,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:33:21,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 11:33:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:21,018 INFO L225 Difference]: With dead ends: 25 [2018-11-18 11:33:21,018 INFO L226 Difference]: Without dead ends: 21 [2018-11-18 11:33:21,019 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:33:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-18 11:33:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-18 11:33:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 11:33:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-18 11:33:21,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-11-18 11:33:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:21,022 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-18 11:33:21,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 11:33:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-18 11:33:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 11:33:21,023 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:21,023 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:21,023 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:21,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:21,023 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2018-11-18 11:33:21,023 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:21,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:21,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:21,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:21,024 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 11:33:21,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:21,069 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:21,069 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:33:21,069 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:33:21,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:21,069 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:21,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 11:33:21,079 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 11:33:21,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 11:33:21,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:33:21,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 11:33:21,103 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 11:33:21,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:21,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2018-11-18 11:33:21,359 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:21,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 11:33:21,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 11:33:21,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:33:21,360 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-11-18 11:33:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:21,400 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 11:33:21,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 11:33:21,401 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-18 11:33:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:21,401 INFO L225 Difference]: With dead ends: 28 [2018-11-18 11:33:21,401 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 11:33:21,402 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-18 11:33:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 11:33:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 11:33:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 11:33:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-18 11:33:21,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-11-18 11:33:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:21,406 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-18 11:33:21,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 11:33:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-18 11:33:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 11:33:21,407 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:21,407 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:21,407 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:21,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2018-11-18 11:33:21,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:21,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:33:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:21,408 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 11:33:21,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:21,472 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:21,472 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:33:21,472 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:33:21,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:21,472 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:21,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 11:33:21,483 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 11:33:21,490 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 11:33:21,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:33:21,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 11:33:21,507 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 11:33:21,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:21,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2018-11-18 11:33:21,801 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:21,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 11:33:21,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 11:33:21,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-11-18 11:33:21,802 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-11-18 11:33:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:21,836 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-18 11:33:21,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 11:33:21,836 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-11-18 11:33:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:21,837 INFO L225 Difference]: With dead ends: 31 [2018-11-18 11:33:21,837 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 11:33:21,837 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2018-11-18 11:33:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 11:33:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 11:33:21,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 11:33:21,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-18 11:33:21,842 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-11-18 11:33:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:21,842 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-18 11:33:21,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 11:33:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-18 11:33:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 11:33:21,843 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:21,843 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:21,843 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:21,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:21,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2018-11-18 11:33:21,843 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:21,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:21,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:33:21,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:21,844 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 11:33:21,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:21,896 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:21,896 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:33:21,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:33:21,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:21,896 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:21,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:21,909 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:33:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:21,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-18 11:33:21,928 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 11:33:22,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:22,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2018-11-18 11:33:22,386 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:22,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 11:33:22,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 11:33:22,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-11-18 11:33:22,387 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-11-18 11:33:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:22,436 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-18 11:33:22,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 11:33:22,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-11-18 11:33:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:22,439 INFO L225 Difference]: With dead ends: 34 [2018-11-18 11:33:22,439 INFO L226 Difference]: Without dead ends: 30 [2018-11-18 11:33:22,439 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2018-11-18 11:33:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-18 11:33:22,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-18 11:33:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 11:33:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-18 11:33:22,442 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-11-18 11:33:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:22,442 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-18 11:33:22,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 11:33:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-18 11:33:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 11:33:22,443 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:22,443 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:22,443 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:22,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:22,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2018-11-18 11:33:22,443 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:22,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:22,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:22,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:22,444 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 11:33:22,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:22,501 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:22,502 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:33:22,502 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:33:22,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:22,502 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:22,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 11:33:22,508 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 11:33:22,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 11:33:22,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:33:22,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-18 11:33:22,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-18 11:33:23,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:23,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2018-11-18 11:33:23,193 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:23,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 11:33:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 11:33:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-11-18 11:33:23,194 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-18 11:33:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:23,242 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-18 11:33:23,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 11:33:23,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-11-18 11:33:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:23,244 INFO L225 Difference]: With dead ends: 37 [2018-11-18 11:33:23,244 INFO L226 Difference]: Without dead ends: 33 [2018-11-18 11:33:23,244 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2018-11-18 11:33:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-18 11:33:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-18 11:33:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 11:33:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-18 11:33:23,250 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-11-18 11:33:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:23,250 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-18 11:33:23,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 11:33:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-18 11:33:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 11:33:23,251 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:23,251 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:23,251 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:23,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:23,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2018-11-18 11:33:23,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:23,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:23,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:33:23,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:23,252 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 11:33:23,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:23,322 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:23,322 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:33:23,322 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:33:23,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:23,323 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:23,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 11:33:23,329 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 11:33:23,340 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 11:33:23,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:33:23,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-18 11:33:23,356 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 11:33:24,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:24,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2018-11-18 11:33:24,177 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:24,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 11:33:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 11:33:24,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-11-18 11:33:24,178 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-11-18 11:33:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:24,233 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-18 11:33:24,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 11:33:24,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-11-18 11:33:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:24,234 INFO L225 Difference]: With dead ends: 40 [2018-11-18 11:33:24,234 INFO L226 Difference]: Without dead ends: 36 [2018-11-18 11:33:24,234 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2018-11-18 11:33:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-18 11:33:24,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-18 11:33:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 11:33:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-18 11:33:24,237 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-11-18 11:33:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:24,237 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-18 11:33:24,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 11:33:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-18 11:33:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 11:33:24,238 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:24,238 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:24,238 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:24,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:24,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2018-11-18 11:33:24,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:24,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:24,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:33:24,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:24,240 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 11:33:24,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:24,309 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:24,309 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:33:24,309 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:33:24,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:24,309 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:24,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:24,316 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:33:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:24,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-11-18 11:33:24,333 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-18 11:33:25,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:25,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2018-11-18 11:33:25,450 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:25,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 11:33:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 11:33:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2018-11-18 11:33:25,451 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-11-18 11:33:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:25,525 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-18 11:33:25,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 11:33:25,525 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-11-18 11:33:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:25,526 INFO L225 Difference]: With dead ends: 43 [2018-11-18 11:33:25,526 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 11:33:25,527 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-11-18 11:33:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 11:33:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 11:33:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 11:33:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 11:33:25,531 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-11-18 11:33:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:25,531 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 11:33:25,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 11:33:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 11:33:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 11:33:25,532 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:25,532 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:25,532 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:25,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:25,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2018-11-18 11:33:25,533 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:25,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:25,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:25,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:25,533 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 11:33:25,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:25,621 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:25,621 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:33:25,621 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:33:25,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:25,621 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:25,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 11:33:25,627 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 11:33:25,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-18 11:33:25,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:33:25,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-11-18 11:33:25,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 11:33:27,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:27,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 23 [2018-11-18 11:33:27,117 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:27,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 11:33:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 11:33:27,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2018-11-18 11:33:27,118 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-18 11:33:27,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:27,194 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-18 11:33:27,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 11:33:27,194 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-11-18 11:33:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:27,195 INFO L225 Difference]: With dead ends: 46 [2018-11-18 11:33:27,195 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 11:33:27,195 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2018-11-18 11:33:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 11:33:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-18 11:33:27,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-18 11:33:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-18 11:33:27,199 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-11-18 11:33:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:27,199 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-18 11:33:27,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 11:33:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-18 11:33:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-18 11:33:27,200 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:27,200 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:27,200 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:27,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:27,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2018-11-18 11:33:27,201 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:27,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:27,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:33:27,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:27,201 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 11:33:27,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:27,283 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:27,283 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:33:27,283 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:33:27,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:27,283 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:27,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 11:33:27,289 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 11:33:27,300 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 11:33:27,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 11:33:27,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-11-18 11:33:27,312 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-18 11:33:29,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:29,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 24 [2018-11-18 11:33:29,259 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:29,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 11:33:29,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 11:33:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-11-18 11:33:29,260 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-11-18 11:33:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:29,328 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-18 11:33:29,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 11:33:29,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-11-18 11:33:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:29,329 INFO L225 Difference]: With dead ends: 49 [2018-11-18 11:33:29,329 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 11:33:29,329 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2018-11-18 11:33:29,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 11:33:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 11:33:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 11:33:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-18 11:33:29,332 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-11-18 11:33:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:29,332 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-18 11:33:29,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 11:33:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-18 11:33:29,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 11:33:29,333 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:29,333 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:29,333 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:29,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2018-11-18 11:33:29,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:29,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:29,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:33:29,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:29,334 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 11:33:29,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:29,610 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 11:33:29,610 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 11:33:29,610 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:33:29,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:33:29,610 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/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 11:33:29,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:29,617 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:33:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:29,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:33:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 11:33:29,684 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:33:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-11-18 11:33:30,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 11:33:30,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 25 [2018-11-18 11:33:30,269 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:33:30,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-18 11:33:30,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-18 11:33:30,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-18 11:33:30,270 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2018-11-18 11:33:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:30,397 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-18 11:33:30,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-18 11:33:30,397 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-11-18 11:33:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:30,398 INFO L225 Difference]: With dead ends: 52 [2018-11-18 11:33:30,398 INFO L226 Difference]: Without dead ends: 48 [2018-11-18 11:33:30,398 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 143 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-18 11:33:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-18 11:33:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-18 11:33:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-18 11:33:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-18 11:33:30,401 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2018-11-18 11:33:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:30,401 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-18 11:33:30,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-18 11:33:30,401 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-18 11:33:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-18 11:33:30,402 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:33:30,402 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:33:30,402 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:33:30,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:33:30,402 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2018-11-18 11:33:30,402 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:33:30,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:30,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:33:30,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:33:30,403 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:33:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:33:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-11-18 11:33:30,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:33:30,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2018-11-18 11:33:30,514 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:33:30,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-18 11:33:30,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-18 11:33:30,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-11-18 11:33:30,515 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2018-11-18 11:33:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:33:30,587 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-11-18 11:33:30,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-18 11:33:30,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2018-11-18 11:33:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:33:30,588 INFO L225 Difference]: With dead ends: 48 [2018-11-18 11:33:30,588 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 11:33:30,589 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-11-18 11:33:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 11:33:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 11:33:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 11:33:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 11:33:30,589 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2018-11-18 11:33:30,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:33:30,590 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 11:33:30,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-18 11:33:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 11:33:30,590 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 11:33:30,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 11:33:30,606 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 11:33:30,606 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 11:33:30,607 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L421 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= 10 main_~input~0) (<= main_~input~0 10)) [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2018-11-18 11:33:30,607 INFO L421 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 11:33:30,607 INFO L425 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-18 11:33:30,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 11:33:30 BoogieIcfgContainer [2018-11-18 11:33:30,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 11:33:30,609 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:33:30,609 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:33:30,609 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:33:30,610 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:33:20" (3/4) ... [2018-11-18 11:33:30,612 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 11:33:30,615 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 11:33:30,616 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 11:33:30,616 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-18 11:33:30,618 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 11:33:30,618 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 11:33:30,618 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 11:33:30,640 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_51f46bf1-3e29-4fc7-87ba-a700d0c62a46/bin-2019/utaipan/witness.graphml [2018-11-18 11:33:30,640 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:33:30,641 INFO L168 Benchmark]: Toolchain (without parser) took 10722.52 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 435.2 MB). Free memory was 953.8 MB in the beginning and 953.1 MB in the end (delta: 622.6 kB). Peak memory consumption was 435.8 MB. Max. memory is 11.5 GB. [2018-11-18 11:33:30,642 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:33:30,642 INFO L168 Benchmark]: CACSL2BoogieTranslator took 142.40 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:33:30,643 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.43 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:33:30,643 INFO L168 Benchmark]: Boogie Preprocessor took 10.00 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:33:30,643 INFO L168 Benchmark]: RCFGBuilder took 157.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 940.3 MB in the beginning and 1.2 GB in the end (delta: -213.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:33:30,644 INFO L168 Benchmark]: TraceAbstraction took 10367.48 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 268.4 MB). Free memory was 1.2 GB in the beginning and 953.1 MB in the end (delta: 200.2 MB). Peak memory consumption was 468.6 MB. Max. memory is 11.5 GB. [2018-11-18 11:33:30,644 INFO L168 Benchmark]: Witness Printer took 30.87 ms. Allocated memory is still 1.5 GB. Free memory is still 953.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:33:30,647 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 142.40 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.43 ms. Allocated memory is still 1.0 GB. Free memory is still 943.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.00 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 157.57 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 940.3 MB in the beginning and 1.2 GB in the end (delta: -213.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10367.48 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 268.4 MB). Free memory was 1.2 GB in the beginning and 953.1 MB in the end (delta: 200.2 MB). Peak memory consumption was 468.6 MB. Max. memory is 11.5 GB. * Witness Printer took 30.87 ms. Allocated memory is still 1.5 GB. Free memory is still 953.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 20 locations, 1 error locations. SAFE Result, 10.3s OverallTime, 12 OverallIterations, 12 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 200 SDtfs, 167 SDslu, 1356 SDs, 0 SdLazy, 791 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1169 GetRequests, 815 SyntacticMatches, 113 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 1012 NumberOfCodeBlocks, 991 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1440 ConstructedInterpolants, 0 QuantifiedInterpolants, 225336 SizeOfPredicates, 64 NumberOfNonLiveVariables, 996 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 1904/4004 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...