./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Ackermann03_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann03_true-unreach-call_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 33d0641b9a339cc7e30dea71c1d04be4d72dcf57 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:43:51,154 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:43:51,156 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:43:51,170 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:43:51,170 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:43:51,171 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:43:51,172 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:43:51,173 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:43:51,175 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:43:51,175 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:43:51,176 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:43:51,176 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:43:51,177 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:43:51,178 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:43:51,179 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:43:51,179 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:43:51,180 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:43:51,182 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:43:51,183 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:43:51,184 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:43:51,185 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:43:51,186 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:43:51,187 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:43:51,188 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:43:51,188 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:43:51,189 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:43:51,190 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:43:51,190 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:43:51,191 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:43:51,191 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:43:51,192 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:43:51,192 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:43:51,193 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:43:51,193 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:43:51,194 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:43:51,194 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:43:51,194 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 23:43:51,205 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:43:51,205 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:43:51,206 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:43:51,206 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 23:43:51,206 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 23:43:51,206 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 23:43:51,206 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 23:43:51,206 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 23:43:51,206 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 23:43:51,207 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 23:43:51,207 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 23:43:51,207 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:43:51,207 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 23:43:51,208 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:43:51,208 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 23:43:51,208 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:43:51,208 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:43:51,208 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:43:51,210 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:43:51,210 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 23:43:51,210 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:43:51,210 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:43:51,210 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:43:51,210 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:43:51,211 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:43:51,211 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:43:51,211 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:43:51,211 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:43:51,211 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:43:51,211 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:43:51,211 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 23:43:51,212 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:43:51,212 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:43:51,212 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 23:43:51,212 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_997d8c17-b806-440e-bad6-4e8b960f3b93/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 -> 33d0641b9a339cc7e30dea71c1d04be4d72dcf57 [2018-10-26 23:43:51,248 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:43:51,258 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:43:51,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:43:51,264 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:43:51,264 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:43:51,264 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Ackermann03_true-unreach-call_true-no-overflow.c [2018-10-26 23:43:51,309 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/data/4715d0136/9a13586d8cd64ce58a279b1112b3dd1c/FLAGf38dee0a1 [2018-10-26 23:43:51,678 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:43:51,679 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/sv-benchmarks/c/recursive/Ackermann03_true-unreach-call_true-no-overflow.c [2018-10-26 23:43:51,684 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/data/4715d0136/9a13586d8cd64ce58a279b1112b3dd1c/FLAGf38dee0a1 [2018-10-26 23:43:51,697 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/data/4715d0136/9a13586d8cd64ce58a279b1112b3dd1c [2018-10-26 23:43:51,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:43:51,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 23:43:51,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:43:51,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:43:51,704 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:43:51,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d316e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51, skipping insertion in model container [2018-10-26 23:43:51,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:43:51,727 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:43:51,849 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:43:51,852 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:43:51,865 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:43:51,875 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:43:51,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51 WrapperNode [2018-10-26 23:43:51,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:43:51,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 23:43:51,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 23:43:51,876 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 23:43:51,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 23:43:51,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:43:51,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:43:51,893 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:43:51,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... [2018-10-26 23:43:51,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:43:51,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:43:51,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:43:51,909 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:43:51,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:43:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:43:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:43:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:43:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:43:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:43:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:43:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-10-26 23:43:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-10-26 23:43:52,388 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:43:52,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:43:52 BoogieIcfgContainer [2018-10-26 23:43:52,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:43:52,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:43:52,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:43:52,393 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:43:52,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:43:51" (1/3) ... [2018-10-26 23:43:52,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ff2b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:43:52, skipping insertion in model container [2018-10-26 23:43:52,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:43:51" (2/3) ... [2018-10-26 23:43:52,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ff2b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:43:52, skipping insertion in model container [2018-10-26 23:43:52,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:43:52" (3/3) ... [2018-10-26 23:43:52,396 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03_true-unreach-call_true-no-overflow.c [2018-10-26 23:43:52,405 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:43:52,412 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:43:52,426 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:43:52,454 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:43:52,454 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:43:52,454 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:43:52,454 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:43:52,454 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:43:52,454 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:43:52,454 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:43:52,454 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:43:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-10-26 23:43:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 23:43:52,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:43:52,476 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:43:52,477 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:43:52,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:43:52,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1560979177, now seen corresponding path program 1 times [2018-10-26 23:43:52,485 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:43:52,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:43:52,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:43:52,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:43:52,527 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:43:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:43:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:43:52,730 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:43:52,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 23:43:52,731 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 23:43:52,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 23:43:52,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 23:43:52,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:43:52,745 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2018-10-26 23:43:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:43:52,964 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2018-10-26 23:43:52,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 23:43:52,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-26 23:43:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:43:52,973 INFO L225 Difference]: With dead ends: 55 [2018-10-26 23:43:52,973 INFO L226 Difference]: Without dead ends: 28 [2018-10-26 23:43:52,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:43:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-26 23:43:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-26 23:43:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-26 23:43:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-10-26 23:43:53,011 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2018-10-26 23:43:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:43:53,012 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-10-26 23:43:53,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 23:43:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-10-26 23:43:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-26 23:43:53,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:43:53,014 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:43:53,014 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:43:53,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:43:53,015 INFO L82 PathProgramCache]: Analyzing trace with hash -649197850, now seen corresponding path program 1 times [2018-10-26 23:43:53,015 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:43:53,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:43:53,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:43:53,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:43:53,016 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:43:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:43:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 23:43:53,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:43:53,129 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:43:53,132 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-10-26 23:43:53,135 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [20], [23], [26], [27], [30], [32], [38], [39], [40], [41], [43], [44], [45], [46] [2018-10-26 23:43:53,182 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:43:53,182 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:43:53,314 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 23:43:53,315 INFO L272 AbstractInterpreter]: Visited 20 different actions 27 times. Merged at 2 different actions 2 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-10-26 23:43:53,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:43:53,354 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 23:43:53,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:43:53,354 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:43:53,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:43:53,368 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 23:43:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:43:53,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:43:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 23:43:53,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:43:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 23:43:53,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:43:53,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-10-26 23:43:53,628 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:43:53,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 23:43:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 23:43:53,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:43:53,629 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2018-10-26 23:43:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:43:53,818 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2018-10-26 23:43:53,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 23:43:53,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-10-26 23:43:53,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:43:53,820 INFO L225 Difference]: With dead ends: 52 [2018-10-26 23:43:53,820 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 23:43:53,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-26 23:43:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 23:43:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-26 23:43:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-26 23:43:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2018-10-26 23:43:53,827 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2018-10-26 23:43:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:43:53,828 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2018-10-26 23:43:53,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 23:43:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2018-10-26 23:43:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-26 23:43:53,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:43:53,829 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:43:53,832 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:43:53,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:43:53,833 INFO L82 PathProgramCache]: Analyzing trace with hash 84169022, now seen corresponding path program 1 times [2018-10-26 23:43:53,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:43:53,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:43:53,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:43:53,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:43:53,835 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:43:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:43:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-26 23:43:53,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:43:53,950 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:43:53,950 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-10-26 23:43:53,951 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [20], [23], [26], [27], [30], [32], [33], [35], [37], [38], [39], [40], [41], [43], [44], [45], [46], [47], [48], [49], [50] [2018-10-26 23:43:53,953 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 23:43:53,954 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 23:43:59,965 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 23:43:59,965 INFO L272 AbstractInterpreter]: Visited 27 different actions 16252 times. Merged at 7 different actions 1584 times. Widened at 2 different actions 733 times. Found 849 fixpoints after 7 different actions. Largest state had 8 variables. [2018-10-26 23:44:00,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:00,009 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 23:44:00,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:00,009 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 23:44:00,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:44:00,019 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:44:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:00,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-26 23:44:00,350 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-26 23:44:00,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:00,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2018-10-26 23:44:00,820 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:00,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 23:44:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 23:44:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-10-26 23:44:00,821 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 11 states. [2018-10-26 23:44:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:01,445 INFO L93 Difference]: Finished difference Result 87 states and 149 transitions. [2018-10-26 23:44:01,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 23:44:01,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-10-26 23:44:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:01,449 INFO L225 Difference]: With dead ends: 87 [2018-10-26 23:44:01,449 INFO L226 Difference]: Without dead ends: 79 [2018-10-26 23:44:01,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2018-10-26 23:44:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-26 23:44:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-26 23:44:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-26 23:44:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2018-10-26 23:44:01,473 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 35 [2018-10-26 23:44:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:01,474 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2018-10-26 23:44:01,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 23:44:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2018-10-26 23:44:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-26 23:44:01,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:01,489 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:01,489 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:01,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash -727723807, now seen corresponding path program 2 times [2018-10-26 23:44:01,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:01,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:01,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:44:01,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:01,491 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 139 proven. 141 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2018-10-26 23:44:01,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:01,746 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:01,746 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:01,747 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:01,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:01,747 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:44:01,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:44:01,763 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 23:44:01,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-26 23:44:01,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:44:01,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 196 proven. 31 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-10-26 23:44:01,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 196 proven. 43 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2018-10-26 23:44:02,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:02,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 13 [2018-10-26 23:44:02,410 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:02,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 23:44:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 23:44:02,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-10-26 23:44:02,411 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 9 states. [2018-10-26 23:44:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:02,671 INFO L93 Difference]: Finished difference Result 266 states and 817 transitions. [2018-10-26 23:44:02,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 23:44:02,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2018-10-26 23:44:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:02,679 INFO L225 Difference]: With dead ends: 266 [2018-10-26 23:44:02,679 INFO L226 Difference]: Without dead ends: 60 [2018-10-26 23:44:02,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 236 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2018-10-26 23:44:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-26 23:44:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-26 23:44:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-26 23:44:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2018-10-26 23:44:02,702 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 122 [2018-10-26 23:44:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:02,703 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2018-10-26 23:44:02,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 23:44:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2018-10-26 23:44:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-26 23:44:02,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:02,706 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:02,707 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:02,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2037912247, now seen corresponding path program 3 times [2018-10-26 23:44:02,707 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:02,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:02,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:44:02,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:02,708 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-10-26 23:44:02,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:02,803 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:02,804 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:02,804 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:02,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:02,804 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:44:02,818 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:44:02,818 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 23:44:02,864 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:44:02,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:44:02,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 141 proven. 37 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-26 23:44:03,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 85 proven. 65 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2018-10-26 23:44:04,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:04,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 15] total 25 [2018-10-26 23:44:04,328 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:04,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 23:44:04,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 23:44:04,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2018-10-26 23:44:04,330 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 13 states. [2018-10-26 23:44:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:04,579 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2018-10-26 23:44:04,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 23:44:04,580 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2018-10-26 23:44:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:04,581 INFO L225 Difference]: With dead ends: 101 [2018-10-26 23:44:04,582 INFO L226 Difference]: Without dead ends: 63 [2018-10-26 23:44:04,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 23:44:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-26 23:44:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2018-10-26 23:44:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-26 23:44:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2018-10-26 23:44:04,590 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 82 [2018-10-26 23:44:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:04,591 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2018-10-26 23:44:04,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 23:44:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2018-10-26 23:44:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-26 23:44:04,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:04,595 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:04,595 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:04,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:04,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1285391477, now seen corresponding path program 4 times [2018-10-26 23:44:04,596 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:04,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:04,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:44:04,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:04,597 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 103 proven. 171 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-10-26 23:44:04,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:04,751 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:04,751 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:04,751 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:04,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:04,752 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:44:04,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:44:04,758 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 23:44:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:04,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 286 proven. 71 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-26 23:44:04,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 121 proven. 161 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2018-10-26 23:44:06,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:06,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 22 [2018-10-26 23:44:06,051 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:06,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 23:44:06,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 23:44:06,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2018-10-26 23:44:06,053 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand 13 states. [2018-10-26 23:44:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:06,354 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2018-10-26 23:44:06,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 23:44:06,355 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2018-10-26 23:44:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:06,356 INFO L225 Difference]: With dead ends: 101 [2018-10-26 23:44:06,357 INFO L226 Difference]: Without dead ends: 63 [2018-10-26 23:44:06,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 202 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 23:44:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-26 23:44:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2018-10-26 23:44:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-26 23:44:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2018-10-26 23:44:06,365 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 108 [2018-10-26 23:44:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:06,366 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2018-10-26 23:44:06,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 23:44:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2018-10-26 23:44:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-26 23:44:06,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:06,368 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:06,368 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:06,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash -536332241, now seen corresponding path program 5 times [2018-10-26 23:44:06,370 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:06,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:06,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:44:06,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:06,371 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 139 proven. 297 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2018-10-26 23:44:06,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:06,796 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:06,796 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:06,796 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:06,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:06,796 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:44:06,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:44:06,803 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 23:44:06,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-26 23:44:06,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:44:06,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 298 proven. 160 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-10-26 23:44:06,953 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:07,505 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-26 23:44:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 328 proven. 153 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-10-26 23:44:08,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:08,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 21] total 28 [2018-10-26 23:44:08,833 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:08,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 23:44:08,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 23:44:08,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2018-10-26 23:44:08,834 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand 17 states. [2018-10-26 23:44:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:09,406 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2018-10-26 23:44:09,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 23:44:09,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 134 [2018-10-26 23:44:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:09,407 INFO L225 Difference]: With dead ends: 116 [2018-10-26 23:44:09,407 INFO L226 Difference]: Without dead ends: 78 [2018-10-26 23:44:09,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 243 SyntacticMatches, 18 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 23:44:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-26 23:44:09,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2018-10-26 23:44:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-26 23:44:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2018-10-26 23:44:09,417 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 134 [2018-10-26 23:44:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:09,417 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2018-10-26 23:44:09,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 23:44:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2018-10-26 23:44:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-26 23:44:09,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:09,419 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:09,419 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:09,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:09,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1071102645, now seen corresponding path program 6 times [2018-10-26 23:44:09,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:09,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:09,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:44:09,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:09,423 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-10-26 23:44:09,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:09,704 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:09,704 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:09,704 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:09,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:09,704 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:44:09,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:44:09,711 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 23:44:09,746 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:44:09,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:44:09,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-10-26 23:44:09,772 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2018-10-26 23:44:12,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:12,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 27] total 33 [2018-10-26 23:44:12,335 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:12,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 23:44:12,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 23:44:12,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 23:44:12,336 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 20 states. [2018-10-26 23:44:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:12,932 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2018-10-26 23:44:12,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 23:44:12,932 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 160 [2018-10-26 23:44:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:12,933 INFO L225 Difference]: With dead ends: 133 [2018-10-26 23:44:12,933 INFO L226 Difference]: Without dead ends: 93 [2018-10-26 23:44:12,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 295 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 23:44:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-26 23:44:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2018-10-26 23:44:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-26 23:44:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2018-10-26 23:44:12,943 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 160 [2018-10-26 23:44:12,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:12,944 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2018-10-26 23:44:12,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 23:44:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2018-10-26 23:44:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-26 23:44:12,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:12,948 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:12,948 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:12,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash -796269959, now seen corresponding path program 7 times [2018-10-26 23:44:12,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:12,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:12,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:44:12,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:12,949 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2018-10-26 23:44:13,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:13,669 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:13,669 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:13,669 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:13,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:13,669 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:44:13,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:44:13,676 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 23:44:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:13,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2018-10-26 23:44:13,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-10-26 23:44:17,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:17,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 28] total 30 [2018-10-26 23:44:17,322 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:17,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 23:44:17,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 23:44:17,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2018-10-26 23:44:17,323 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand 21 states. [2018-10-26 23:44:17,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:17,889 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2018-10-26 23:44:17,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 23:44:17,890 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 173 [2018-10-26 23:44:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:17,891 INFO L225 Difference]: With dead ends: 148 [2018-10-26 23:44:17,891 INFO L226 Difference]: Without dead ends: 103 [2018-10-26 23:44:17,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 319 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 23:44:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-26 23:44:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2018-10-26 23:44:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-26 23:44:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 108 transitions. [2018-10-26 23:44:17,903 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 108 transitions. Word has length 173 [2018-10-26 23:44:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:17,904 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 108 transitions. [2018-10-26 23:44:17,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 23:44:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 108 transitions. [2018-10-26 23:44:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-26 23:44:17,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:17,906 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:17,906 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:17,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash -470648935, now seen corresponding path program 8 times [2018-10-26 23:44:17,907 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:17,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:17,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:44:17,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:17,908 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-10-26 23:44:18,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:18,262 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:18,263 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:18,263 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:18,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:18,263 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:44:18,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:44:18,270 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 23:44:18,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 23:44:18,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:44:18,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-10-26 23:44:18,653 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2018-10-26 23:44:19,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:19,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 33] total 35 [2018-10-26 23:44:19,908 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:19,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 23:44:19,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 23:44:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 23:44:19,909 INFO L87 Difference]: Start difference. First operand 80 states and 108 transitions. Second operand 23 states. [2018-10-26 23:44:20,357 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-26 23:44:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:20,941 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2018-10-26 23:44:20,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 23:44:20,942 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2018-10-26 23:44:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:20,943 INFO L225 Difference]: With dead ends: 129 [2018-10-26 23:44:20,943 INFO L226 Difference]: Without dead ends: 125 [2018-10-26 23:44:20,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 358 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2018-10-26 23:44:20,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-26 23:44:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2018-10-26 23:44:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-26 23:44:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2018-10-26 23:44:20,954 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 186 [2018-10-26 23:44:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:20,955 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2018-10-26 23:44:20,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 23:44:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2018-10-26 23:44:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-26 23:44:20,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:20,959 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:20,959 INFO L424 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:20,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash -105502571, now seen corresponding path program 9 times [2018-10-26 23:44:20,960 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:20,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:20,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:44:20,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:20,960 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2018-10-26 23:44:21,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:21,250 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:21,250 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:21,250 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:21,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:21,250 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/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 [2018-10-26 23:44:21,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:44:21,256 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 23:44:21,328 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:44:21,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:44:21,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2018-10-26 23:44:21,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:25,784 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-26 23:44:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2018-10-26 23:44:25,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:25,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 32] total 34 [2018-10-26 23:44:25,895 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:25,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 23:44:25,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 23:44:25,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 23:44:25,897 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand 23 states. [2018-10-26 23:44:26,369 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-26 23:44:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:27,401 INFO L93 Difference]: Finished difference Result 216 states and 284 transitions. [2018-10-26 23:44:27,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 23:44:27,402 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 199 [2018-10-26 23:44:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:27,403 INFO L225 Difference]: With dead ends: 216 [2018-10-26 23:44:27,403 INFO L226 Difference]: Without dead ends: 121 [2018-10-26 23:44:27,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 367 SyntacticMatches, 36 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=685, Invalid=2855, Unknown=0, NotChecked=0, Total=3540 [2018-10-26 23:44:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-26 23:44:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 85. [2018-10-26 23:44:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-26 23:44:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2018-10-26 23:44:27,413 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 199 [2018-10-26 23:44:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:27,414 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2018-10-26 23:44:27,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 23:44:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2018-10-26 23:44:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-26 23:44:27,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:27,415 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:27,415 INFO L424 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:27,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash 393268291, now seen corresponding path program 10 times [2018-10-26 23:44:27,416 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:27,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:27,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:44:27,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:27,420 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 258 proven. 785 refuted. 0 times theorem prover too weak. 1277 trivial. 0 not checked. [2018-10-26 23:44:27,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:27,625 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:27,626 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:27,626 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:27,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:27,626 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:44:27,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:44:27,633 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 23:44:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:27,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2018-10-26 23:44:27,703 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-26 23:44:29,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:29,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 21] total 23 [2018-10-26 23:44:29,587 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:29,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 23:44:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 23:44:29,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2018-10-26 23:44:29,588 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 16 states. [2018-10-26 23:44:29,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:29,907 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2018-10-26 23:44:29,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 23:44:29,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 212 [2018-10-26 23:44:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:29,908 INFO L225 Difference]: With dead ends: 154 [2018-10-26 23:44:29,908 INFO L226 Difference]: Without dead ends: 96 [2018-10-26 23:44:29,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 404 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 23:44:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-26 23:44:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2018-10-26 23:44:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-26 23:44:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2018-10-26 23:44:29,917 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 212 [2018-10-26 23:44:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:29,917 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2018-10-26 23:44:29,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 23:44:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2018-10-26 23:44:29,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-10-26 23:44:29,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:44:29,919 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 24, 20, 19, 19, 19, 19, 19, 19, 19, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:44:29,919 INFO L424 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:44:29,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:44:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1644374046, now seen corresponding path program 11 times [2018-10-26 23:44:29,920 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:44:29,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:29,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:44:29,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:44:29,924 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:44:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:44:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4764 backedges. 239 proven. 542 refuted. 0 times theorem prover too weak. 3983 trivial. 0 not checked. [2018-10-26 23:44:30,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:30,172 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 23:44:30,172 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 23:44:30,173 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 23:44:30,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:44:30,173 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:44:30,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:44:30,181 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 23:44:30,226 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-26 23:44:30,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:44:30,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:44:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4764 backedges. 215 proven. 426 refuted. 0 times theorem prover too weak. 4123 trivial. 0 not checked. [2018-10-26 23:44:30,358 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:44:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4764 backedges. 215 proven. 433 refuted. 0 times theorem prover too weak. 4116 trivial. 0 not checked. [2018-10-26 23:44:30,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 23:44:30,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 16 [2018-10-26 23:44:30,733 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 23:44:30,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 23:44:30,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 23:44:30,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-10-26 23:44:30,734 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 13 states. [2018-10-26 23:44:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:44:31,575 INFO L93 Difference]: Finished difference Result 178 states and 223 transitions. [2018-10-26 23:44:31,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 23:44:31,576 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 297 [2018-10-26 23:44:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:44:31,576 INFO L225 Difference]: With dead ends: 178 [2018-10-26 23:44:31,576 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 23:44:31,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 590 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2018-10-26 23:44:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 23:44:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 23:44:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 23:44:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 23:44:31,578 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 297 [2018-10-26 23:44:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:44:31,578 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 23:44:31,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 23:44:31,578 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 23:44:31,578 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 23:44:31,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 23:44:31,930 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:31,932 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,191 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,196 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,207 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,251 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,308 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,313 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,335 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,364 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,377 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,382 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,398 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 23:44:32,969 WARN L179 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 18 [2018-10-26 23:44:34,682 WARN L179 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 194 DAG size of output: 53 [2018-10-26 23:44:34,774 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 23:44:34,774 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 23:44:34,774 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 23:44:34,774 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 23:44:34,774 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 23:44:34,774 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 23:44:34,774 INFO L425 ceAbstractionStarter]: For program point L33(lines 33 38) no Hoare annotation was computed. [2018-10-26 23:44:34,774 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2018-10-26 23:44:34,774 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 31) no Hoare annotation was computed. [2018-10-26 23:44:34,774 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2018-10-26 23:44:34,774 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2018-10-26 23:44:34,774 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2018-10-26 23:44:34,774 INFO L425 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-10-26 23:44:34,775 INFO L425 ceAbstractionStarter]: For program point L40(lines 40 44) no Hoare annotation was computed. [2018-10-26 23:44:34,775 INFO L428 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: true [2018-10-26 23:44:34,775 INFO L425 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-10-26 23:44:34,775 INFO L425 ceAbstractionStarter]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2018-10-26 23:44:34,775 INFO L428 ceAbstractionStarter]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2018-10-26 23:44:34,775 INFO L421 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (or (< |ackermann_#in~n| 0) (<= 1 |ackermann_#in~n|)) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|))) [2018-10-26 23:44:34,775 INFO L425 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-10-26 23:44:34,775 INFO L421 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~n| 0) (= |ackermann_#in~m| ackermann_~m) (= ackermann_~n |ackermann_#in~n|) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|)) (<= 0 |ackermann_#in~n|)) [2018-10-26 23:44:34,775 INFO L421 ceAbstractionStarter]: At program point L21-2(line 21) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (let ((.cse1 (<= 5 |ackermann_#t~ret1|)) (.cse11 (<= 2 |ackermann_#in~m|))) (let ((.cse3 (<= |ackermann_#t~ret1| 5)) (.cse6 (and .cse1 .cse11)) (.cse5 (= ackermann_~n |ackermann_#in~n|)) (.cse4 (<= 2 |ackermann_#in~n|)) (.cse8 (<= 3 |ackermann_#t~ret1|)) (.cse12 (<= |ackermann_#t~ret1| 3)) (.cse9 (<= 1 |ackermann_#in~n|)) (.cse10 (<= |ackermann_#in~n| 1)) (.cse7 (<= 3 |ackermann_#in~n|)) (.cse13 (<= |ackermann_#in~m| 1)) (.cse0 (<= 1 |ackermann_#in~m|)) (.cse2 (<= ackermann_~n |ackermann_#in~n|))) (or (and .cse0 .cse1 .cse2 (<= |ackermann_#in~n| 4) .cse3 (<= 4 |ackermann_#in~n|)) (<= 3 |ackermann_#in~m|) (and .cse0 .cse1 .cse2 (<= 6 |ackermann_#in~n|)) (and .cse4 .cse5 .cse6 .cse3) (and .cse7 (and .cse6 .cse2)) (and .cse8 .cse5 .cse9 .cse10 .cse11 .cse12) (and .cse4 .cse8 .cse0 (<= |ackermann_#in~n| 2) .cse2 .cse13 .cse12) (and .cse0 .cse2 .cse9 .cse10 .cse13 (<= 2 |ackermann_#t~ret1|) (<= |ackermann_#t~ret1| 2)) (and .cse0 (<= 4 |ackermann_#t~ret1|) .cse2 (<= |ackermann_#in~n| 3) .cse7 .cse13 (<= |ackermann_#t~ret1| 4)) (and .cse0 .cse2 (<= |ackermann_#t~ret1| 6) (<= 6 |ackermann_#t~ret1|) (<= 5 |ackermann_#in~n|)))))) [2018-10-26 23:44:34,775 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 20) no Hoare annotation was computed. [2018-10-26 23:44:34,775 INFO L425 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-10-26 23:44:34,776 INFO L425 ceAbstractionStarter]: For program point L21-3(line 21) no Hoare annotation was computed. [2018-10-26 23:44:34,776 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-10-26 23:44:34,776 INFO L425 ceAbstractionStarter]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2018-10-26 23:44:34,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 11:44:34 BoogieIcfgContainer [2018-10-26 23:44:34,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 23:44:34,779 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 23:44:34,779 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 23:44:34,779 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 23:44:34,779 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:43:52" (3/4) ... [2018-10-26 23:44:34,786 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 23:44:34,791 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 23:44:34,791 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 23:44:34,792 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2018-10-26 23:44:34,798 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-10-26 23:44:34,799 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-26 23:44:34,799 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 23:44:34,834 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_997d8c17-b806-440e-bad6-4e8b960f3b93/bin-2019/utaipan/witness.graphml [2018-10-26 23:44:34,834 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 23:44:34,835 INFO L168 Benchmark]: Toolchain (without parser) took 43134.79 ms. Allocated memory was 1.0 GB in the beginning and 2.7 GB in the end (delta: 1.6 GB). Free memory was 964.5 MB in the beginning and 1.4 GB in the end (delta: -390.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2018-10-26 23:44:34,836 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:44:34,836 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.16 ms. Allocated memory is still 1.0 GB. Free memory was 964.5 MB in the beginning and 953.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:44:34,836 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.70 ms. Allocated memory is still 1.0 GB. Free memory is still 953.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:44:34,836 INFO L168 Benchmark]: Boogie Preprocessor took 15.50 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 948.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-26 23:44:34,837 INFO L168 Benchmark]: RCFGBuilder took 480.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 948.4 MB in the beginning and 1.2 GB in the end (delta: -207.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-10-26 23:44:34,837 INFO L168 Benchmark]: TraceAbstraction took 42388.74 ms. Allocated memory was 1.2 GB in the beginning and 2.7 GB in the end (delta: 1.5 GB). Free memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: -198.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. [2018-10-26 23:44:34,837 INFO L168 Benchmark]: Witness Printer took 55.52 ms. Allocated memory is still 2.7 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:44:34,839 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.16 ms. Allocated memory is still 1.0 GB. Free memory was 964.5 MB in the beginning and 953.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.70 ms. Allocated memory is still 1.0 GB. Free memory is still 953.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.50 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 948.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 480.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 175.1 MB). Free memory was 948.4 MB in the beginning and 1.2 GB in the end (delta: -207.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 42388.74 ms. Allocated memory was 1.2 GB in the beginning and 2.7 GB in the end (delta: 1.5 GB). Free memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: -198.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 11.5 GB. * Witness Printer took 55.52 ms. Allocated memory is still 2.7 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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, 27 locations, 1 error locations. SAFE Result, 42.3s OverallTime, 13 OverallIterations, 44 TraceHistogramMax, 7.3s AutomataDifference, 0.0s DeadEndRemovalTime, 3.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 387 SDtfs, 296 SDslu, 2213 SDs, 0 SdLazy, 4939 SolverSat, 605 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3923 GetRequests, 3275 SyntacticMatches, 180 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5083 ImplicationChecksByTransitivity, 10.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 6.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 142 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 541 PreInvPairs, 1596 NumberOfFragments, 230 HoareAnnotationTreeSize, 541 FomulaSimplifications, 186323 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 9 FomulaSimplificationsInter, 81668 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 23.9s InterpolantComputationTime, 3475 NumberOfCodeBlocks, 3136 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 5168 ConstructedInterpolants, 0 QuantifiedInterpolants, 1756334 SizeOfPredicates, 98 NumberOfNonLiveVariables, 4115 ConjunctsInSsa, 315 ConjunctsInUnsatCore, 37 InterpolantComputations, 1 PerfectInterpolantSequences, 38960/47640 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...