./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 307542ef0214b83df72c59e51df6e57e6557ac8b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-27 05:47:38,240 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 05:47:38,242 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 05:47:38,251 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 05:47:38,252 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 05:47:38,253 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 05:47:38,254 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 05:47:38,255 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 05:47:38,260 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 05:47:38,261 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 05:47:38,262 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 05:47:38,262 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 05:47:38,263 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 05:47:38,268 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 05:47:38,276 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 05:47:38,277 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 05:47:38,277 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 05:47:38,279 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 05:47:38,281 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 05:47:38,288 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 05:47:38,289 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 05:47:38,289 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 05:47:38,291 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 05:47:38,295 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 05:47:38,295 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 05:47:38,296 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 05:47:38,297 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 05:47:38,297 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 05:47:38,298 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 05:47:38,299 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 05:47:38,299 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 05:47:38,302 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 05:47:38,302 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 05:47:38,303 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 05:47:38,303 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 05:47:38,304 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 05:47:38,304 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-10-27 05:47:38,321 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 05:47:38,322 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 05:47:38,322 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 05:47:38,323 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 05:47:38,323 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 05:47:38,323 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 05:47:38,323 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 05:47:38,327 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 05:47:38,327 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 05:47:38,327 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 05:47:38,328 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 05:47:38,328 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 05:47:38,329 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-27 05:47:38,329 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-10-27 05:47:38,329 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 05:47:38,329 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-27 05:47:38,329 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 05:47:38,329 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 05:47:38,329 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 05:47:38,330 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 05:47:38,330 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-10-27 05:47:38,330 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-27 05:47:38,330 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 05:47:38,330 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 05:47:38,330 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 05:47:38,331 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 05:47:38,331 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 05:47:38,331 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 05:47:38,331 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 05:47:38,331 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 05:47:38,331 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 05:47:38,332 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 05:47:38,332 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 05:47:38,332 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 05:47:38,332 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 05:47:38,332 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 05:47:38,332 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_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/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 ! overflow) ) 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 -> 307542ef0214b83df72c59e51df6e57e6557ac8b [2018-10-27 05:47:38,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 05:47:38,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 05:47:38,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 05:47:38,377 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 05:47:38,377 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 05:47:38,378 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c [2018-10-27 05:47:38,434 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/data/0a2d287ca/7f6a81c71b5a43ca9082b323ae331190/FLAG297f11124 [2018-10-27 05:47:38,828 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 05:47:38,829 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c [2018-10-27 05:47:38,833 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/data/0a2d287ca/7f6a81c71b5a43ca9082b323ae331190/FLAG297f11124 [2018-10-27 05:47:38,843 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/data/0a2d287ca/7f6a81c71b5a43ca9082b323ae331190 [2018-10-27 05:47:38,846 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 05:47:38,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-27 05:47:38,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 05:47:38,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 05:47:38,851 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 05:47:38,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:47:38" (1/1) ... [2018-10-27 05:47:38,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14956367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:38, skipping insertion in model container [2018-10-27 05:47:38,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:47:38" (1/1) ... [2018-10-27 05:47:38,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 05:47:38,876 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 05:47:38,987 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:47:38,990 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 05:47:39,002 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 05:47:39,014 INFO L193 MainTranslator]: Completed translation [2018-10-27 05:47:39,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39 WrapperNode [2018-10-27 05:47:39,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 05:47:39,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 05:47:39,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 05:47:39,016 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 05:47:39,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... [2018-10-27 05:47:39,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... [2018-10-27 05:47:39,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 05:47:39,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 05:47:39,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 05:47:39,032 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 05:47:39,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... [2018-10-27 05:47:39,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... [2018-10-27 05:47:39,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... [2018-10-27 05:47:39,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... [2018-10-27 05:47:39,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... [2018-10-27 05:47:39,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... [2018-10-27 05:47:39,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... [2018-10-27 05:47:39,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 05:47:39,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 05:47:39,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 05:47:39,046 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 05:47:39,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/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 [2018-10-27 05:47:39,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 05:47:39,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 05:47:39,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 05:47:39,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 05:47:39,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 05:47:39,143 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 05:47:39,143 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-10-27 05:47:39,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-10-27 05:47:39,631 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 05:47:39,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:47:39 BoogieIcfgContainer [2018-10-27 05:47:39,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 05:47:39,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 05:47:39,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 05:47:39,636 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 05:47:39,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:47:38" (1/3) ... [2018-10-27 05:47:39,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5c746c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:47:39, skipping insertion in model container [2018-10-27 05:47:39,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:39" (2/3) ... [2018-10-27 05:47:39,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5c746c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:47:39, skipping insertion in model container [2018-10-27 05:47:39,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:47:39" (3/3) ... [2018-10-27 05:47:39,641 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04_true-unreach-call_true-no-overflow.c [2018-10-27 05:47:39,650 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 05:47:39,658 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-10-27 05:47:39,674 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-10-27 05:47:39,705 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 05:47:39,705 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 05:47:39,706 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 05:47:39,706 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 05:47:39,706 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 05:47:39,706 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 05:47:39,706 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 05:47:39,706 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 05:47:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-10-27 05:47:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-27 05:47:39,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:39,729 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:47:39,730 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:39,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:39,736 INFO L82 PathProgramCache]: Analyzing trace with hash -437746855, now seen corresponding path program 1 times [2018-10-27 05:47:39,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:39,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:39,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:39,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:39,781 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:47:39,903 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:47:39,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:47:39,903 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:47:39,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:47:39,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:47:39,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:47:39,920 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2018-10-27 05:47:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:47:40,309 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2018-10-27 05:47:40,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:47:40,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-27 05:47:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:47:40,320 INFO L225 Difference]: With dead ends: 77 [2018-10-27 05:47:40,320 INFO L226 Difference]: Without dead ends: 62 [2018-10-27 05:47:40,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:47:40,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-27 05:47:40,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2018-10-27 05:47:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-27 05:47:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2018-10-27 05:47:40,362 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 11 [2018-10-27 05:47:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:47:40,362 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2018-10-27 05:47:40,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:47:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2018-10-27 05:47:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-27 05:47:40,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:40,364 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:47:40,366 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:40,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:40,367 INFO L82 PathProgramCache]: Analyzing trace with hash -685250558, now seen corresponding path program 1 times [2018-10-27 05:47:40,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:40,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:40,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:40,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:40,368 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:47:40,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:47:40,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:47:40,429 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:47:40,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:47:40,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:47:40,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:47:40,434 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 5 states. [2018-10-27 05:47:40,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:47:40,581 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2018-10-27 05:47:40,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:47:40,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-10-27 05:47:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:47:40,589 INFO L225 Difference]: With dead ends: 83 [2018-10-27 05:47:40,589 INFO L226 Difference]: Without dead ends: 81 [2018-10-27 05:47:40,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:47:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-27 05:47:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2018-10-27 05:47:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-27 05:47:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2018-10-27 05:47:40,602 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 12 [2018-10-27 05:47:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:47:40,602 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2018-10-27 05:47:40,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:47:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2018-10-27 05:47:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-27 05:47:40,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:40,604 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:47:40,604 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:40,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash -685245561, now seen corresponding path program 1 times [2018-10-27 05:47:40,605 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:40,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:40,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:40,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:40,606 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:47:40,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:47:40,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:47:40,660 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:47:40,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:47:40,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:47:40,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:47:40,661 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 5 states. [2018-10-27 05:47:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:47:40,831 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2018-10-27 05:47:40,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:47:40,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-10-27 05:47:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:47:40,835 INFO L225 Difference]: With dead ends: 73 [2018-10-27 05:47:40,835 INFO L226 Difference]: Without dead ends: 71 [2018-10-27 05:47:40,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:47:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-27 05:47:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-27 05:47:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-27 05:47:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2018-10-27 05:47:40,849 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 12 [2018-10-27 05:47:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:47:40,850 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2018-10-27 05:47:40,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:47:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2018-10-27 05:47:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-27 05:47:40,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:40,851 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:47:40,853 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:40,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:40,853 INFO L82 PathProgramCache]: Analyzing trace with hash 232224156, now seen corresponding path program 1 times [2018-10-27 05:47:40,853 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:40,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:40,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:40,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:40,856 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:47:40,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:47:40,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:47:40,926 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:47:40,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:47:40,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:47:40,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:47:40,927 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand 5 states. [2018-10-27 05:47:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:47:41,008 INFO L93 Difference]: Finished difference Result 119 states and 157 transitions. [2018-10-27 05:47:41,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 05:47:41,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-27 05:47:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:47:41,013 INFO L225 Difference]: With dead ends: 119 [2018-10-27 05:47:41,013 INFO L226 Difference]: Without dead ends: 111 [2018-10-27 05:47:41,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-27 05:47:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-27 05:47:41,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2018-10-27 05:47:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-27 05:47:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2018-10-27 05:47:41,032 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 13 [2018-10-27 05:47:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:47:41,032 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2018-10-27 05:47:41,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:47:41,033 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2018-10-27 05:47:41,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-27 05:47:41,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:41,033 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:47:41,034 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:41,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:41,034 INFO L82 PathProgramCache]: Analyzing trace with hash 579139995, now seen corresponding path program 1 times [2018-10-27 05:47:41,034 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:41,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:41,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:41,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:41,038 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:47:41,080 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:47:41,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:47:41,080 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:47:41,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:47:41,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:47:41,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:47:41,081 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand 4 states. [2018-10-27 05:47:41,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:47:41,399 INFO L93 Difference]: Finished difference Result 171 states and 224 transitions. [2018-10-27 05:47:41,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:47:41,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-10-27 05:47:41,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:47:41,402 INFO L225 Difference]: With dead ends: 171 [2018-10-27 05:47:41,402 INFO L226 Difference]: Without dead ends: 100 [2018-10-27 05:47:41,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:47:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-27 05:47:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2018-10-27 05:47:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-27 05:47:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2018-10-27 05:47:41,413 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 19 [2018-10-27 05:47:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:47:41,414 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2018-10-27 05:47:41,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:47:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2018-10-27 05:47:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-27 05:47:41,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:41,415 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:47:41,415 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:41,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash 579146946, now seen corresponding path program 1 times [2018-10-27 05:47:41,416 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:41,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:41,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:41,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:41,418 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:47:41,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:47:41,515 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:47:41,516 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-10-27 05:47:41,517 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [22], [30], [33], [35], [37], [40], [42], [43], [54], [55], [56], [58], [60] [2018-10-27 05:47:41,560 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:47:41,560 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:47:41,691 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:47:41,693 INFO L272 AbstractInterpreter]: Visited 17 different actions 23 times. Never merged. Never widened. Never found a fixpoint. Largest state had 4 variables. [2018-10-27 05:47:41,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:41,708 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:47:41,777 INFO L227 lantSequenceWeakener]: Weakened 9 states. On average, predicates are now at 63.89% of their original sizes. [2018-10-27 05:47:41,777 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:47:42,065 INFO L415 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2018-10-27 05:47:42,065 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:47:42,066 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:47:42,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 17 [2018-10-27 05:47:42,066 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:47:42,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 05:47:42,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 05:47:42,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-10-27 05:47:42,067 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand 13 states. [2018-10-27 05:47:43,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:47:43,343 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2018-10-27 05:47:43,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 05:47:43,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2018-10-27 05:47:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:47:43,344 INFO L225 Difference]: With dead ends: 141 [2018-10-27 05:47:43,345 INFO L226 Difference]: Without dead ends: 137 [2018-10-27 05:47:43,345 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-10-27 05:47:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-27 05:47:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2018-10-27 05:47:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-27 05:47:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2018-10-27 05:47:43,363 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 19 [2018-10-27 05:47:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:47:43,363 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2018-10-27 05:47:43,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 05:47:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2018-10-27 05:47:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-27 05:47:43,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:43,365 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:47:43,365 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:43,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash 178790620, now seen corresponding path program 1 times [2018-10-27 05:47:43,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:43,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:43,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:43,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:43,369 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:47:43,400 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:47:43,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:47:43,400 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:47:43,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:47:43,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:47:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:47:43,401 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 4 states. [2018-10-27 05:47:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:47:43,549 INFO L93 Difference]: Finished difference Result 236 states and 312 transitions. [2018-10-27 05:47:43,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:47:43,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-10-27 05:47:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:47:43,552 INFO L225 Difference]: With dead ends: 236 [2018-10-27 05:47:43,552 INFO L226 Difference]: Without dead ends: 154 [2018-10-27 05:47:43,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:47:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-27 05:47:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 144. [2018-10-27 05:47:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-27 05:47:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 175 transitions. [2018-10-27 05:47:43,580 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 175 transitions. Word has length 20 [2018-10-27 05:47:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:47:43,580 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 175 transitions. [2018-10-27 05:47:43,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:47:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 175 transitions. [2018-10-27 05:47:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-27 05:47:43,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:43,581 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:47:43,582 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:43,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:43,582 INFO L82 PathProgramCache]: Analyzing trace with hash 747525739, now seen corresponding path program 1 times [2018-10-27 05:47:43,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:43,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:43,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:43,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:43,585 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 05:47:43,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:47:43,640 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:47:43,641 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-10-27 05:47:43,641 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [22], [30], [40], [42], [44], [46], [47], [48], [54], [55], [56], [58], [62] [2018-10-27 05:47:43,642 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:47:43,642 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:47:43,668 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:47:43,669 INFO L272 AbstractInterpreter]: Visited 17 different actions 44 times. Never merged. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-10-27 05:47:43,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:43,679 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:47:43,714 INFO L227 lantSequenceWeakener]: Weakened 13 states. On average, predicates are now at 53.85% of their original sizes. [2018-10-27 05:47:43,714 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:47:44,061 INFO L415 sIntCurrentIteration]: We unified 22 AI predicates to 22 [2018-10-27 05:47:44,061 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:47:44,061 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:47:44,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 17 [2018-10-27 05:47:44,061 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:47:44,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 05:47:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 05:47:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-10-27 05:47:44,062 INFO L87 Difference]: Start difference. First operand 144 states and 175 transitions. Second operand 13 states. [2018-10-27 05:47:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:47:45,204 INFO L93 Difference]: Finished difference Result 189 states and 230 transitions. [2018-10-27 05:47:45,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-27 05:47:45,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2018-10-27 05:47:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:47:45,207 INFO L225 Difference]: With dead ends: 189 [2018-10-27 05:47:45,207 INFO L226 Difference]: Without dead ends: 186 [2018-10-27 05:47:45,208 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2018-10-27 05:47:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-27 05:47:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 176. [2018-10-27 05:47:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-27 05:47:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 211 transitions. [2018-10-27 05:47:45,229 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 211 transitions. Word has length 23 [2018-10-27 05:47:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:47:45,229 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 211 transitions. [2018-10-27 05:47:45,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 05:47:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 211 transitions. [2018-10-27 05:47:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-27 05:47:45,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:45,231 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 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, 1, 1, 1] [2018-10-27 05:47:45,232 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:45,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:45,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1151540446, now seen corresponding path program 1 times [2018-10-27 05:47:45,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:45,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:45,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:45,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:45,234 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 05:47:45,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:47:45,301 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:47:45,301 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-10-27 05:47:45,301 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [22], [25], [26], [27], [29], [30], [33], [35], [37], [39], [40], [42], [44], [46], [48], [50], [53], [54], [55], [56], [58], [60], [61], [62], [63], [64] [2018-10-27 05:47:45,302 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:47:45,302 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:47:45,601 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:47:45,601 INFO L272 AbstractInterpreter]: Visited 30 different actions 858 times. Merged at 2 different actions 2 times. Widened at 1 different actions 10 times. Found 17 fixpoints after 3 different actions. Largest state had 7 variables. [2018-10-27 05:47:45,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:45,648 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:47:45,688 INFO L227 lantSequenceWeakener]: Weakened 24 states. On average, predicates are now at 57.08% of their original sizes. [2018-10-27 05:47:45,688 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:47:46,207 INFO L415 sIntCurrentIteration]: We unified 35 AI predicates to 35 [2018-10-27 05:47:46,208 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:47:46,208 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:47:46,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [8] total 28 [2018-10-27 05:47:46,208 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:47:46,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-27 05:47:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-27 05:47:46,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2018-10-27 05:47:46,209 INFO L87 Difference]: Start difference. First operand 176 states and 211 transitions. Second operand 22 states. [2018-10-27 05:47:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:47:54,586 INFO L93 Difference]: Finished difference Result 419 states and 557 transitions. [2018-10-27 05:47:54,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-27 05:47:54,586 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2018-10-27 05:47:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:47:54,589 INFO L225 Difference]: With dead ends: 419 [2018-10-27 05:47:54,589 INFO L226 Difference]: Without dead ends: 315 [2018-10-27 05:47:54,590 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2018-10-27 05:47:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-27 05:47:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 294. [2018-10-27 05:47:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-27 05:47:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 356 transitions. [2018-10-27 05:47:54,628 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 356 transitions. Word has length 36 [2018-10-27 05:47:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:47:54,628 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 356 transitions. [2018-10-27 05:47:54,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-27 05:47:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 356 transitions. [2018-10-27 05:47:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-27 05:47:54,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:47:54,632 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:47:54,632 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:47:54,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:47:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash 64457351, now seen corresponding path program 1 times [2018-10-27 05:47:54,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:47:54,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:54,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:47:54,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:47:54,634 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:47:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:47:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-27 05:47:54,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:47:54,785 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:47:54,785 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 72 with the following transitions: [2018-10-27 05:47:54,785 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [22], [25], [26], [27], [29], [30], [33], [35], [37], [39], [40], [42], [44], [46], [48], [50], [52], [53], [54], [55], [56], [58], [60], [61], [62], [63], [64], [65] [2018-10-27 05:47:54,787 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:47:54,787 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:48:09,634 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:48:09,635 INFO L272 AbstractInterpreter]: Visited 32 different actions 58344 times. Merged at 7 different actions 3489 times. Widened at 2 different actions 1977 times. Found 2351 fixpoints after 6 different actions. Largest state had 8 variables. [2018-10-27 05:48:09,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:48:09,680 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:48:09,740 INFO L227 lantSequenceWeakener]: Weakened 44 states. On average, predicates are now at 53.64% of their original sizes. [2018-10-27 05:48:09,740 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:48:10,278 INFO L415 sIntCurrentIteration]: We unified 70 AI predicates to 70 [2018-10-27 05:48:10,279 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:48:10,279 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:48:10,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [30] imperfect sequences [11] total 40 [2018-10-27 05:48:10,279 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:48:10,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-27 05:48:10,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-27 05:48:10,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2018-10-27 05:48:10,280 INFO L87 Difference]: Start difference. First operand 294 states and 356 transitions. Second operand 30 states. [2018-10-27 05:48:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:48:18,740 INFO L93 Difference]: Finished difference Result 467 states and 577 transitions. [2018-10-27 05:48:18,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-27 05:48:18,740 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 71 [2018-10-27 05:48:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:48:18,742 INFO L225 Difference]: With dead ends: 467 [2018-10-27 05:48:18,742 INFO L226 Difference]: Without dead ends: 147 [2018-10-27 05:48:18,745 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=553, Invalid=2417, Unknown=0, NotChecked=0, Total=2970 [2018-10-27 05:48:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-27 05:48:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2018-10-27 05:48:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-27 05:48:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 165 transitions. [2018-10-27 05:48:18,756 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 165 transitions. Word has length 71 [2018-10-27 05:48:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:48:18,757 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 165 transitions. [2018-10-27 05:48:18,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-27 05:48:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 165 transitions. [2018-10-27 05:48:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-27 05:48:18,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:48:18,758 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:48:18,758 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:48:18,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:48:18,759 INFO L82 PathProgramCache]: Analyzing trace with hash 708889275, now seen corresponding path program 2 times [2018-10-27 05:48:18,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:48:18,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:18,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:48:18,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:18,763 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:48:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:48:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 05:48:19,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:48:19,324 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:48:19,324 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:48:19,325 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:48:19,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:48:19,325 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/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 [2018-10-27 05:48:19,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 05:48:19,332 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 05:48:19,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-27 05:48:19,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:48:19,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:48:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 05:48:19,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:48:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-27 05:48:20,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:48:20,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 23 [2018-10-27 05:48:20,035 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:48:20,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 05:48:20,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 05:48:20,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2018-10-27 05:48:20,036 INFO L87 Difference]: Start difference. First operand 141 states and 165 transitions. Second operand 12 states. [2018-10-27 05:48:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:48:20,860 INFO L93 Difference]: Finished difference Result 280 states and 398 transitions. [2018-10-27 05:48:20,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-27 05:48:20,861 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-10-27 05:48:20,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:48:20,863 INFO L225 Difference]: With dead ends: 280 [2018-10-27 05:48:20,863 INFO L226 Difference]: Without dead ends: 278 [2018-10-27 05:48:20,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=1544, Unknown=0, NotChecked=0, Total=1892 [2018-10-27 05:48:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-10-27 05:48:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 234. [2018-10-27 05:48:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-27 05:48:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 320 transitions. [2018-10-27 05:48:20,886 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 320 transitions. Word has length 55 [2018-10-27 05:48:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:48:20,886 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 320 transitions. [2018-10-27 05:48:20,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 05:48:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 320 transitions. [2018-10-27 05:48:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-27 05:48:20,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:48:20,890 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:48:20,890 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:48:20,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:48:20,890 INFO L82 PathProgramCache]: Analyzing trace with hash 500731104, now seen corresponding path program 1 times [2018-10-27 05:48:20,890 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:48:20,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:20,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:48:20,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:20,891 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:48:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:48:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-27 05:48:20,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:48:20,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 05:48:20,957 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:48:20,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 05:48:20,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 05:48:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:48:20,958 INFO L87 Difference]: Start difference. First operand 234 states and 320 transitions. Second operand 5 states. [2018-10-27 05:48:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:48:21,092 INFO L93 Difference]: Finished difference Result 238 states and 320 transitions. [2018-10-27 05:48:21,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 05:48:21,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2018-10-27 05:48:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:48:21,097 INFO L225 Difference]: With dead ends: 238 [2018-10-27 05:48:21,097 INFO L226 Difference]: Without dead ends: 237 [2018-10-27 05:48:21,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-27 05:48:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-27 05:48:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2018-10-27 05:48:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-27 05:48:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 318 transitions. [2018-10-27 05:48:21,125 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 318 transitions. Word has length 56 [2018-10-27 05:48:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:48:21,125 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 318 transitions. [2018-10-27 05:48:21,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 05:48:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 318 transitions. [2018-10-27 05:48:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-27 05:48:21,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:48:21,127 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:48:21,127 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:48:21,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:48:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1657049986, now seen corresponding path program 1 times [2018-10-27 05:48:21,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:48:21,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:21,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:48:21,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:21,128 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:48:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:48:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-27 05:48:21,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:48:21,488 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:48:21,488 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-10-27 05:48:21,488 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [22], [25], [27], [29], [30], [33], [35], [36], [37], [39], [40], [42], [44], [46], [48], [50], [52], [53], [54], [55], [56], [58], [60], [61], [62], [63], [64], [65] [2018-10-27 05:48:21,489 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:48:21,489 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:48:34,039 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:48:34,039 INFO L272 AbstractInterpreter]: Visited 32 different actions 57233 times. Merged at 7 different actions 3489 times. Widened at 2 different actions 1977 times. Found 2351 fixpoints after 6 different actions. Largest state had 8 variables. [2018-10-27 05:48:34,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:48:34,391 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:48:34,436 INFO L227 lantSequenceWeakener]: Weakened 41 states. On average, predicates are now at 55.41% of their original sizes. [2018-10-27 05:48:34,436 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:48:36,692 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-10-27 05:48:36,693 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:48:36,693 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:48:36,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [32] imperfect sequences [6] total 37 [2018-10-27 05:48:36,693 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:48:36,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-27 05:48:36,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-27 05:48:36,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2018-10-27 05:48:36,695 INFO L87 Difference]: Start difference. First operand 233 states and 318 transitions. Second operand 32 states. [2018-10-27 05:48:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:48:41,286 INFO L93 Difference]: Finished difference Result 433 states and 611 transitions. [2018-10-27 05:48:41,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-27 05:48:41,286 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 57 [2018-10-27 05:48:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:48:41,290 INFO L225 Difference]: With dead ends: 433 [2018-10-27 05:48:41,290 INFO L226 Difference]: Without dead ends: 262 [2018-10-27 05:48:41,292 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=441, Invalid=2751, Unknown=0, NotChecked=0, Total=3192 [2018-10-27 05:48:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-10-27 05:48:41,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2018-10-27 05:48:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-27 05:48:41,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 354 transitions. [2018-10-27 05:48:41,322 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 354 transitions. Word has length 57 [2018-10-27 05:48:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:48:41,326 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 354 transitions. [2018-10-27 05:48:41,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-27 05:48:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 354 transitions. [2018-10-27 05:48:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-27 05:48:41,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:48:41,327 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:48:41,327 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:48:41,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:48:41,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1842760932, now seen corresponding path program 2 times [2018-10-27 05:48:41,328 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:48:41,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:41,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:48:41,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:41,329 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:48:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:48:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-10-27 05:48:41,506 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 05:48:41,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 05:48:41,506 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:48:41,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 05:48:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 05:48:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-27 05:48:41,509 INFO L87 Difference]: Start difference. First operand 260 states and 354 transitions. Second operand 4 states. [2018-10-27 05:48:41,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:48:41,553 INFO L93 Difference]: Finished difference Result 264 states and 354 transitions. [2018-10-27 05:48:41,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 05:48:41,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2018-10-27 05:48:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:48:41,556 INFO L225 Difference]: With dead ends: 264 [2018-10-27 05:48:41,556 INFO L226 Difference]: Without dead ends: 262 [2018-10-27 05:48:41,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-27 05:48:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2018-10-27 05:48:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2018-10-27 05:48:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-27 05:48:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 348 transitions. [2018-10-27 05:48:41,577 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 348 transitions. Word has length 65 [2018-10-27 05:48:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:48:41,577 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 348 transitions. [2018-10-27 05:48:41,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 05:48:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 348 transitions. [2018-10-27 05:48:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-27 05:48:41,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:48:41,578 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:48:41,578 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:48:41,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:48:41,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1373412045, now seen corresponding path program 1 times [2018-10-27 05:48:41,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:48:41,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:41,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:48:41,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:41,583 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:48:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:48:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-10-27 05:48:41,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:48:41,793 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:48:41,793 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 68 with the following transitions: [2018-10-27 05:48:41,794 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [22], [25], [27], [29], [30], [33], [35], [37], [39], [40], [42], [44], [46], [47], [48], [50], [52], [53], [54], [55], [56], [58], [60], [61], [62], [63], [64], [65] [2018-10-27 05:48:41,795 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 05:48:41,795 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 05:48:49,962 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 05:48:49,962 INFO L272 AbstractInterpreter]: Visited 32 different actions 58985 times. Merged at 7 different actions 3489 times. Widened at 2 different actions 1977 times. Found 2351 fixpoints after 6 different actions. Largest state had 8 variables. [2018-10-27 05:48:49,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:48:49,964 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 05:48:50,031 INFO L227 lantSequenceWeakener]: Weakened 52 states. On average, predicates are now at 55.22% of their original sizes. [2018-10-27 05:48:50,031 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 05:48:50,916 INFO L415 sIntCurrentIteration]: We unified 66 AI predicates to 66 [2018-10-27 05:48:50,916 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 05:48:50,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 05:48:50,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [34] imperfect sequences [7] total 40 [2018-10-27 05:48:50,917 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 05:48:50,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-27 05:48:50,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-27 05:48:50,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2018-10-27 05:48:50,918 INFO L87 Difference]: Start difference. First operand 260 states and 348 transitions. Second operand 35 states. [2018-10-27 05:48:58,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:48:58,724 INFO L93 Difference]: Finished difference Result 461 states and 636 transitions. [2018-10-27 05:48:58,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-27 05:48:58,724 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2018-10-27 05:48:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:48:58,726 INFO L225 Difference]: With dead ends: 461 [2018-10-27 05:48:58,726 INFO L226 Difference]: Without dead ends: 280 [2018-10-27 05:48:58,730 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=478, Invalid=3182, Unknown=0, NotChecked=0, Total=3660 [2018-10-27 05:48:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-10-27 05:48:58,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 278. [2018-10-27 05:48:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-10-27 05:48:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 371 transitions. [2018-10-27 05:48:58,751 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 371 transitions. Word has length 67 [2018-10-27 05:48:58,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:48:58,751 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 371 transitions. [2018-10-27 05:48:58,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-27 05:48:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 371 transitions. [2018-10-27 05:48:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-27 05:48:58,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:48:58,754 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:48:58,754 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:48:58,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:48:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1964193486, now seen corresponding path program 3 times [2018-10-27 05:48:58,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:48:58,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:58,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 05:48:58,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:48:58,758 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:48:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:48:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-10-27 05:48:58,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:48:58,915 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:48:58,916 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:48:58,916 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:48:58,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:48:58,916 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 05:48:58,926 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:48:58,926 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:48:58,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:48:58,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:48:58,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:48:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-10-27 05:48:58,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:48:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-27 05:48:59,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:48:59,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 18] total 31 [2018-10-27 05:48:59,769 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:48:59,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 05:48:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 05:48:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2018-10-27 05:48:59,770 INFO L87 Difference]: Start difference. First operand 278 states and 371 transitions. Second operand 15 states. [2018-10-27 05:49:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:01,209 INFO L93 Difference]: Finished difference Result 500 states and 759 transitions. [2018-10-27 05:49:01,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-27 05:49:01,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2018-10-27 05:49:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:01,212 INFO L225 Difference]: With dead ends: 500 [2018-10-27 05:49:01,212 INFO L226 Difference]: Without dead ends: 498 [2018-10-27 05:49:01,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=3508, Unknown=0, NotChecked=0, Total=4290 [2018-10-27 05:49:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2018-10-27 05:49:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 384. [2018-10-27 05:49:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2018-10-27 05:49:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 565 transitions. [2018-10-27 05:49:01,246 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 565 transitions. Word has length 74 [2018-10-27 05:49:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:01,247 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 565 transitions. [2018-10-27 05:49:01,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 05:49:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 565 transitions. [2018-10-27 05:49:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-27 05:49:01,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 05:49:01,249 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 05:49:01,250 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-10-27 05:49:01,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 05:49:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2099140299, now seen corresponding path program 3 times [2018-10-27 05:49:01,250 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 05:49:01,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:01,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-27 05:49:01,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 05:49:01,251 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 05:49:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 05:49:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-10-27 05:49:01,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:01,385 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 05:49:01,385 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 05:49:01,385 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 05:49:01,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 05:49:01,385 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/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 [2018-10-27 05:49:01,399 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-27 05:49:01,399 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-27 05:49:01,431 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-27 05:49:01,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 05:49:01,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 05:49:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-10-27 05:49:01,512 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 05:49:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2018-10-27 05:49:01,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 05:49:01,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 14 [2018-10-27 05:49:01,767 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 05:49:01,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 05:49:01,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 05:49:01,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-27 05:49:01,767 INFO L87 Difference]: Start difference. First operand 384 states and 565 transitions. Second operand 12 states. [2018-10-27 05:49:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 05:49:02,076 INFO L93 Difference]: Finished difference Result 397 states and 578 transitions. [2018-10-27 05:49:02,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 05:49:02,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2018-10-27 05:49:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 05:49:02,080 INFO L225 Difference]: With dead ends: 397 [2018-10-27 05:49:02,080 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 05:49:02,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-10-27 05:49:02,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 05:49:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 05:49:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 05:49:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 05:49:02,082 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 76 [2018-10-27 05:49:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 05:49:02,082 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 05:49:02,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 05:49:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 05:49:02,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 05:49:02,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 05:49:04,487 WARN L179 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 244 DAG size of output: 62 [2018-10-27 05:49:05,622 WARN L179 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 272 DAG size of output: 48 [2018-10-27 05:49:07,924 WARN L179 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 299 DAG size of output: 75 [2018-10-27 05:49:07,961 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-27 05:49:07,961 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-27 05:49:07,961 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-27 05:49:07,961 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-27 05:49:07,961 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-27 05:49:07,961 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-27 05:49:07,961 INFO L425 ceAbstractionStarter]: For program point L33(lines 33 38) no Hoare annotation was computed. [2018-10-27 05:49:07,961 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2018-10-27 05:49:07,961 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 31) no Hoare annotation was computed. [2018-10-27 05:49:07,961 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2018-10-27 05:49:07,961 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point L40(lines 40 44) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L421 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (* 2 main_~m~0))) (and (<= 0 .cse0) (<= .cse0 6) (<= 0 (* 2 main_~n~0)) (<= main_~n~0 23))) [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point L21-2(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,962 INFO L425 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-10-27 05:49:07,963 INFO L425 ceAbstractionStarter]: For program point L21-3(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,963 INFO L421 ceAbstractionStarter]: At program point L19-2(line 19) the Hoare annotation is: (let ((.cse3 (* 2 |ackermann_#in~n|))) (let ((.cse2 (< 3 |ackermann_#in~m|)) (.cse4 (< .cse3 0)) (.cse6 (+ |ackermann_#in~m| |ackermann_#in~n|)) (.cse1 (< (* 2 |ackermann_#in~m|) 0)) (.cse5 (= |ackermann_#in~m| 0))) (and (or (let ((.cse0 (* 2 ackermann_~n))) (and (<= .cse0 40) (<= 0 ackermann_~m) (<= 0 .cse0) (<= ackermann_~m 3) (not (= ackermann_~m 0)))) .cse1 .cse2 (< 46 .cse3) .cse4) (or (and (<= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (<= ackermann_~n 3)) (< |ackermann_#in~m| 0) .cse2 .cse5 (< 42 .cse3) .cse4) (or (not (= |ackermann_#in~n| 2)) (< .cse6 2) (< 4 .cse6)) (or (< .cse3 2) (< 3 .cse6) .cse1) (or (< 4 |ackermann_#in~n|) (< (+ |ackermann_#in~n| 2147483648) 0) (not .cse5))))) [2018-10-27 05:49:07,963 INFO L421 ceAbstractionStarter]: At program point L21-4(line 21) the Hoare annotation is: (let ((.cse1 (* 2 ackermann_~n))) (and (or (< 4 |ackermann_#in~n|) (< (+ |ackermann_#in~n| 2147483648) 0) (not (= |ackermann_#in~m| 0))) (let ((.cse0 (+ |ackermann_#in~m| |ackermann_#in~n|))) (or (not (= |ackermann_#in~n| 2)) (< .cse0 2) (<= 4 .cse1) (< 4 .cse0))) (let ((.cse2 (* 2 |ackermann_#in~n|))) (or (and (<= ackermann_~n |ackermann_#in~n|) (not (= ackermann_~n 0)) (= ackermann_~m |ackermann_#in~m|) (<= 0 .cse1) (not (= ackermann_~m 0))) (< (* 2 |ackermann_#in~m|) 0) (< 3 |ackermann_#in~m|) (< 46 .cse2) (< .cse2 0))))) [2018-10-27 05:49:07,963 INFO L425 ceAbstractionStarter]: For program point L19-3(line 19) no Hoare annotation was computed. [2018-10-27 05:49:07,963 INFO L425 ceAbstractionStarter]: For program point L21-5(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,963 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-10-27 05:49:07,963 INFO L421 ceAbstractionStarter]: At program point L21-6(line 21) the Hoare annotation is: (let ((.cse0 (* 2 |ackermann_#in~n|))) (let ((.cse3 (= |ackermann_#in~m| 0)) (.cse1 (< |ackermann_#in~m| 0)) (.cse2 (< 3 |ackermann_#in~m|)) (.cse5 (= ackermann_~m 1)) (.cse6 (= ackermann_~m |ackermann_#in~m|)) (.cse4 (< .cse0 0))) (and (or (< 40 .cse0) .cse1 .cse2 .cse3 .cse4) (or (< 4 |ackermann_#in~n|) (< (+ |ackermann_#in~n| 2147483648) 0) (not .cse3)) (or .cse1 (< 44 .cse0) .cse2 .cse3 .cse4 (and (<= |ackermann_#t~ret1| 3) .cse5 .cse6 (<= 4 (* 2 |ackermann_#t~ret1|)))) (or .cse1 (and (<= ackermann_~n (+ ackermann_~m 19)) (<= |ackermann_#t~ret1| (+ ackermann_~m 1))) .cse2 (< 42 .cse0) .cse4) (or (let ((.cse7 (* 2 ackermann_~n))) (and (<= .cse7 40) (not (= ackermann_~n 0)) (= |ackermann_#t~ret1| 2) (<= 3 (+ |ackermann_#t~ret1| ackermann_~m)) (<= 0 .cse7) (<= ackermann_~m 3))) (< (* 2 |ackermann_#in~m|) 0) .cse2 (and (<= ackermann_~n |ackermann_#in~n|) (<= 0 (+ |ackermann_#t~ret1| 2147483648)) (<= 2 (+ ackermann_~n ackermann_~m)) .cse5 (<= |ackermann_#t~ret1| 4) .cse6) (< 46 .cse0) .cse4)))) [2018-10-27 05:49:07,963 INFO L425 ceAbstractionStarter]: For program point L21-7(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 16) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW(line 21) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L428 ceAbstractionStarter]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 20) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 16) no Hoare annotation was computed. [2018-10-27 05:49:07,964 INFO L425 ceAbstractionStarter]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2018-10-27 05:49:07,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 05:49:07 BoogieIcfgContainer [2018-10-27 05:49:07,967 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 05:49:07,968 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-27 05:49:07,968 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-27 05:49:07,968 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-27 05:49:07,968 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:47:39" (3/4) ... [2018-10-27 05:49:07,980 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-27 05:49:07,986 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-27 05:49:07,986 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-27 05:49:07,986 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2018-10-27 05:49:07,992 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-10-27 05:49:07,992 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-27 05:49:07,992 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-27 05:49:08,031 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d81bcb0e-3aa9-4d9b-809a-9d1f48e0dca7/bin-2019/utaipan/witness.graphml [2018-10-27 05:49:08,031 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-27 05:49:08,032 INFO L168 Benchmark]: Toolchain (without parser) took 89186.01 ms. Allocated memory was 1.0 GB in the beginning and 5.6 GB in the end (delta: 4.5 GB). Free memory was 953.1 MB in the beginning and 2.6 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.9 GB. Max. memory is 11.5 GB. [2018-10-27 05:49:08,033 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 980.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:49:08,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.36 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-27 05:49:08,034 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.75 ms. Allocated memory is still 1.0 GB. Free memory is still 942.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:49:08,034 INFO L168 Benchmark]: Boogie Preprocessor took 14.27 ms. Allocated memory is still 1.0 GB. Free memory was 942.3 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-27 05:49:08,034 INFO L168 Benchmark]: RCFGBuilder took 585.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -199.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2018-10-27 05:49:08,035 INFO L168 Benchmark]: TraceAbstraction took 88334.49 ms. Allocated memory was 1.2 GB in the beginning and 5.6 GB in the end (delta: 4.4 GB). Free memory was 1.1 GB in the beginning and 2.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 3.0 GB. Max. memory is 11.5 GB. [2018-10-27 05:49:08,039 INFO L168 Benchmark]: Witness Printer took 63.75 ms. Allocated memory is still 5.6 GB. Free memory is still 2.6 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-27 05:49:08,041 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 980.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 167.36 ms. Allocated memory is still 1.0 GB. Free memory was 953.1 MB in the beginning and 942.3 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 15.75 ms. Allocated memory is still 1.0 GB. Free memory is still 942.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.27 ms. Allocated memory is still 1.0 GB. Free memory was 942.3 MB in the beginning and 939.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 585.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -199.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 88334.49 ms. Allocated memory was 1.2 GB in the beginning and 5.6 GB in the end (delta: 4.4 GB). Free memory was 1.1 GB in the beginning and 2.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 3.0 GB. Max. memory is 11.5 GB. * Witness Printer took 63.75 ms. Allocated memory is still 5.6 GB. Free memory is still 2.6 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 16]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 16]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 21]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 8 error locations. SAFE Result, 88.2s OverallTime, 17 OverallIterations, 8 TraceHistogramMax, 35.7s AutomataDifference, 0.0s DeadEndRemovalTime, 5.8s HoareAnnotationTime, HoareTripleCheckerStatistics: 591 SDtfs, 1600 SDslu, 2373 SDs, 0 SdLazy, 3872 SolverSat, 835 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.7s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 926 GetRequests, 520 SyntacticMatches, 14 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4066 ImplicationChecksByTransitivity, 12.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=384occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 36.5s AbstIntTime, 6 AbstIntIterations, 6 AbstIntStrong, 0.9168673087212412 AbsIntWeakeningRatio, 0.5955056179775281 AbsIntAvgWeakeningVarsNumRemoved, 15.348314606741573 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 244 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 905 PreInvPairs, 911 NumberOfFragments, 418 HoareAnnotationTreeSize, 905 FomulaSimplifications, 594 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 9 FomulaSimplificationsInter, 9868 FormulaSimplificationTreeSizeReductionInter, 5.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 891 NumberOfCodeBlocks, 860 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1073 ConstructedInterpolants, 0 QuantifiedInterpolants, 137453 SizeOfPredicates, 16 NumberOfNonLiveVariables, 446 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 1033/1359 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...