./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2f1e635c5c806286d01eb0b8ff07448b8253a7a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 04:03:02,723 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 04:03:02,724 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 04:03:02,730 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 04:03:02,730 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 04:03:02,731 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 04:03:02,732 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 04:03:02,732 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 04:03:02,733 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 04:03:02,734 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 04:03:02,734 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 04:03:02,734 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 04:03:02,735 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 04:03:02,735 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 04:03:02,736 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 04:03:02,736 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 04:03:02,737 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 04:03:02,737 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 04:03:02,738 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 04:03:02,739 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 04:03:02,740 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 04:03:02,740 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 04:03:02,741 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 04:03:02,741 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 04:03:02,742 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 04:03:02,742 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 04:03:02,742 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 04:03:02,743 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 04:03:02,743 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 04:03:02,744 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 04:03:02,744 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 04:03:02,744 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 04:03:02,744 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 04:03:02,745 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 04:03:02,745 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 04:03:02,745 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 04:03:02,746 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 04:03:02,752 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 04:03:02,753 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 04:03:02,753 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 04:03:02,753 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 04:03:02,753 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 04:03:02,753 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 04:03:02,753 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 04:03:02,754 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 04:03:02,754 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 04:03:02,754 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 04:03:02,754 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 04:03:02,754 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 04:03:02,754 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 04:03:02,754 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 04:03:02,754 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 04:03:02,755 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 04:03:02,755 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 04:03:02,756 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 04:03:02,756 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 04:03:02,756 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 04:03:02,756 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 04:03:02,756 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 04:03:02,756 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 04:03:02,756 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 04:03:02,756 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 04:03:02,756 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 04:03:02,756 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_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2f1e635c5c806286d01eb0b8ff07448b8253a7a [2018-12-09 04:03:02,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 04:03:02,783 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 04:03:02,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 04:03:02,786 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 04:03:02,786 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 04:03:02,787 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c [2018-12-09 04:03:02,832 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/data/9392547ed/d2eec90600434df3a1c977724de0e947/FLAG4fb72c7b3 [2018-12-09 04:03:03,164 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 04:03:03,164 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/sv-benchmarks/c/recursive/Ackermann01_true-unreach-call_true-no-overflow.c [2018-12-09 04:03:03,168 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/data/9392547ed/d2eec90600434df3a1c977724de0e947/FLAG4fb72c7b3 [2018-12-09 04:03:03,176 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/data/9392547ed/d2eec90600434df3a1c977724de0e947 [2018-12-09 04:03:03,178 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 04:03:03,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 04:03:03,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 04:03:03,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 04:03:03,182 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 04:03:03,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54724d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03, skipping insertion in model container [2018-12-09 04:03:03,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 04:03:03,197 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 04:03:03,278 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 04:03:03,280 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 04:03:03,289 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 04:03:03,297 INFO L195 MainTranslator]: Completed translation [2018-12-09 04:03:03,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03 WrapperNode [2018-12-09 04:03:03,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 04:03:03,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 04:03:03,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 04:03:03,298 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 04:03:03,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 04:03:03,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 04:03:03,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 04:03:03,309 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 04:03:03,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... [2018-12-09 04:03:03,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 04:03:03,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 04:03:03,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 04:03:03,320 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 04:03:03,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 04:03:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 04:03:03,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 04:03:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 04:03:03,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 04:03:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-12-09 04:03:03,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-12-09 04:03:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 04:03:03,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 04:03:03,473 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 04:03:03,473 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-09 04:03:03,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:03:03 BoogieIcfgContainer [2018-12-09 04:03:03,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 04:03:03,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 04:03:03,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 04:03:03,476 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 04:03:03,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:03:03" (1/3) ... [2018-12-09 04:03:03,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7555696c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:03:03, skipping insertion in model container [2018-12-09 04:03:03,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:03:03" (2/3) ... [2018-12-09 04:03:03,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7555696c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:03:03, skipping insertion in model container [2018-12-09 04:03:03,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:03:03" (3/3) ... [2018-12-09 04:03:03,478 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01_true-unreach-call_true-no-overflow.c [2018-12-09 04:03:03,483 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 04:03:03,488 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 04:03:03,497 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 04:03:03,515 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 04:03:03,516 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 04:03:03,516 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 04:03:03,516 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 04:03:03,516 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 04:03:03,516 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 04:03:03,516 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 04:03:03,516 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 04:03:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-12-09 04:03:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-09 04:03:03,530 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:03:03,530 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 04:03:03,532 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:03:03,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2018-12-09 04:03:03,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:03:03,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:03,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:03,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:03,567 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:03:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 04:03:03,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 04:03:03,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 04:03:03,652 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 04:03:03,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 04:03:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 04:03:03,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 04:03:03,664 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2018-12-09 04:03:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:03:03,759 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2018-12-09 04:03:03,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 04:03:03,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-12-09 04:03:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:03:03,766 INFO L225 Difference]: With dead ends: 41 [2018-12-09 04:03:03,766 INFO L226 Difference]: Without dead ends: 25 [2018-12-09 04:03:03,768 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-12-09 04:03:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-12-09 04:03:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-12-09 04:03:03,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-09 04:03:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2018-12-09 04:03:03,793 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2018-12-09 04:03:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:03:03,793 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2018-12-09 04:03:03,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 04:03:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2018-12-09 04:03:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 04:03:03,795 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:03:03,795 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 04:03:03,795 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:03:03,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:03,796 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2018-12-09 04:03:03,796 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:03:03,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:03,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:03,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:03,797 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:03:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 04:03:03,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:03,871 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:03:03,871 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-12-09 04:03:03,873 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [8], [11], [13], [19], [20], [24], [28], [30], [34], [36], [39], [40], [41], [43], [44], [49], [50] [2018-12-09 04:03:03,894 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:03:03,894 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:03:03,992 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 04:03:03,993 INFO L272 AbstractInterpreter]: Visited 20 different actions 27 times. Merged at 2 different actions 2 times. Never widened. Performed 77 root evaluator evaluations with a maximum evaluation depth of 3. Performed 77 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-12-09 04:03:03,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:03,998 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 04:03:03,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:03,999 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:03:04,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:04,007 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 04:03:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:04,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:03:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 04:03:04,035 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:03:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 04:03:04,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:03:04,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 14 [2018-12-09 04:03:04,172 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 04:03:04,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 04:03:04,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 04:03:04,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-12-09 04:03:04,173 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 8 states. [2018-12-09 04:03:04,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:03:04,262 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2018-12-09 04:03:04,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 04:03:04,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-12-09 04:03:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:03:04,263 INFO L225 Difference]: With dead ends: 32 [2018-12-09 04:03:04,263 INFO L226 Difference]: Without dead ends: 28 [2018-12-09 04:03:04,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-12-09 04:03:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-09 04:03:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-12-09 04:03:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-09 04:03:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2018-12-09 04:03:04,268 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 22 [2018-12-09 04:03:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:03:04,268 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2018-12-09 04:03:04,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 04:03:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2018-12-09 04:03:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-09 04:03:04,269 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:03:04,269 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 04:03:04,270 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:03:04,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:04,270 INFO L82 PathProgramCache]: Analyzing trace with hash 408363011, now seen corresponding path program 1 times [2018-12-09 04:03:04,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:03:04,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:04,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:04,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:04,271 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:03:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 04:03:04,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:04,300 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:03:04,300 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-12-09 04:03:04,300 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [8], [14], [16], [18], [19], [20], [24], [28], [30], [34], [36], [39], [40], [41], [45], [46], [47], [48], [49], [50] [2018-12-09 04:03:04,301 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:03:04,301 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:03:04,323 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 04:03:04,323 INFO L272 AbstractInterpreter]: Visited 18 different actions 33 times. Never merged. Never widened. Performed 93 root evaluator evaluations with a maximum evaluation depth of 3. Performed 93 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2018-12-09 04:03:04,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:04,324 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 04:03:04,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:04,324 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/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 [2018-12-09 04:03:04,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:04,332 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 04:03:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:04,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:03:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 04:03:04,377 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:03:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-09 04:03:04,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 04:03:04,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2018-12-09 04:03:04,504 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:03:04,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 04:03:04,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 04:03:04,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:03:04,505 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2018-12-09 04:03:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:03:04,602 INFO L93 Difference]: Finished difference Result 51 states and 78 transitions. [2018-12-09 04:03:04,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 04:03:04,602 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-12-09 04:03:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:03:04,603 INFO L225 Difference]: With dead ends: 51 [2018-12-09 04:03:04,603 INFO L226 Difference]: Without dead ends: 33 [2018-12-09 04:03:04,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-12-09 04:03:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-09 04:03:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-12-09 04:03:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-12-09 04:03:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-12-09 04:03:04,608 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2018-12-09 04:03:04,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:03:04,608 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-12-09 04:03:04,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 04:03:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-12-09 04:03:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-12-09 04:03:04,609 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:03:04,610 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 04:03:04,610 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:03:04,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2018-12-09 04:03:04,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:03:04,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:04,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:04,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:04,611 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:03:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-09 04:03:04,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:04,671 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:03:04,671 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-12-09 04:03:04,672 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [8], [11], [13], [14], [16], [18], [19], [20], [24], [28], [30], [34], [36], [39], [40], [41], [43], [44], [45], [46], [47], [48], [49], [50] [2018-12-09 04:03:04,673 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:03:04,673 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:03:06,840 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 04:03:06,840 INFO L272 AbstractInterpreter]: Visited 27 different actions 17636 times. Merged at 7 different actions 1067 times. Widened at 2 different actions 519 times. Performed 51773 root evaluator evaluations with a maximum evaluation depth of 4. Performed 51773 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1603 fixpoints after 8 different actions. Largest state had 8 variables. [2018-12-09 04:03:06,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:06,842 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 04:03:06,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:06,842 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/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 [2018-12-09 04:03:06,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:06,851 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 04:03:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:06,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:03:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-12-09 04:03:06,874 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:03:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-12-09 04:03:07,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 04:03:07,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 22 [2018-12-09 04:03:07,194 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:03:07,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 04:03:07,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 04:03:07,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2018-12-09 04:03:07,195 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 11 states. [2018-12-09 04:03:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:03:07,338 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2018-12-09 04:03:07,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 04:03:07,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-12-09 04:03:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:03:07,340 INFO L225 Difference]: With dead ends: 42 [2018-12-09 04:03:07,340 INFO L226 Difference]: Without dead ends: 38 [2018-12-09 04:03:07,341 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2018-12-09 04:03:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-09 04:03:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2018-12-09 04:03:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-09 04:03:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2018-12-09 04:03:07,348 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 35 [2018-12-09 04:03:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:03:07,348 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2018-12-09 04:03:07,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 04:03:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2018-12-09 04:03:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 04:03:07,349 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:03:07,350 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 04:03:07,350 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:03:07,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:07,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1711672813, now seen corresponding path program 2 times [2018-12-09 04:03:07,350 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:03:07,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:07,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:07,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:07,351 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:03:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 04:03:07,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:07,413 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:03:07,413 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:03:07,413 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:03:07,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:07,414 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:03:07,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 04:03:07,421 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 04:03:07,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 04:03:07,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:03:07,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:03:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 04:03:07,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:03:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-09 04:03:07,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 04:03:07,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 24 [2018-12-09 04:03:07,850 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:03:07,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 04:03:07,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 04:03:07,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2018-12-09 04:03:07,851 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 12 states. [2018-12-09 04:03:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:03:08,004 INFO L93 Difference]: Finished difference Result 49 states and 75 transitions. [2018-12-09 04:03:08,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 04:03:08,005 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-12-09 04:03:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:03:08,006 INFO L225 Difference]: With dead ends: 49 [2018-12-09 04:03:08,006 INFO L226 Difference]: Without dead ends: 45 [2018-12-09 04:03:08,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2018-12-09 04:03:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-09 04:03:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-12-09 04:03:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-12-09 04:03:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2018-12-09 04:03:08,011 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 42 [2018-12-09 04:03:08,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:03:08,011 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2018-12-09 04:03:08,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 04:03:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2018-12-09 04:03:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-12-09 04:03:08,012 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:03:08,012 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 04:03:08,012 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:03:08,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:08,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1051926487, now seen corresponding path program 3 times [2018-12-09 04:03:08,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:03:08,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:08,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:03:08,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:08,013 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:03:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-12-09 04:03:08,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:08,093 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:03:08,094 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:03:08,094 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:03:08,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:08,094 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:03:08,099 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 04:03:08,099 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 04:03:08,106 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 04:03:08,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:03:08,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:03:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-12-09 04:03:08,159 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:03:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-09 04:03:08,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 04:03:08,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 20 [2018-12-09 04:03:08,373 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:03:08,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 04:03:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 04:03:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-12-09 04:03:08,374 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand 16 states. [2018-12-09 04:03:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:03:08,663 INFO L93 Difference]: Finished difference Result 88 states and 167 transitions. [2018-12-09 04:03:08,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 04:03:08,663 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-12-09 04:03:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:03:08,664 INFO L225 Difference]: With dead ends: 88 [2018-12-09 04:03:08,664 INFO L226 Difference]: Without dead ends: 60 [2018-12-09 04:03:08,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2018-12-09 04:03:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-12-09 04:03:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-12-09 04:03:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-12-09 04:03:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 105 transitions. [2018-12-09 04:03:08,672 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 105 transitions. Word has length 42 [2018-12-09 04:03:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:03:08,672 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 105 transitions. [2018-12-09 04:03:08,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 04:03:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 105 transitions. [2018-12-09 04:03:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-12-09 04:03:08,674 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:03:08,674 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 04:03:08,674 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:03:08,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:08,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2003160496, now seen corresponding path program 4 times [2018-12-09 04:03:08,674 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:03:08,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:08,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:03:08,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:08,675 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:03:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-12-09 04:03:08,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:08,691 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:03:08,691 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:03:08,691 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:03:08,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:08,691 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:03:08,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:08,697 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 04:03:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:08,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:03:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-09 04:03:08,714 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:03:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-12-09 04:03:08,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 04:03:08,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2018-12-09 04:03:08,802 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:03:08,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 04:03:08,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 04:03:08,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 04:03:08,803 INFO L87 Difference]: Start difference. First operand 60 states and 105 transitions. Second operand 4 states. [2018-12-09 04:03:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:03:08,826 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2018-12-09 04:03:08,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 04:03:08,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-12-09 04:03:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:03:08,827 INFO L225 Difference]: With dead ends: 110 [2018-12-09 04:03:08,827 INFO L226 Difference]: Without dead ends: 63 [2018-12-09 04:03:08,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-12-09 04:03:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-09 04:03:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-12-09 04:03:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-09 04:03:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 111 transitions. [2018-12-09 04:03:08,834 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 111 transitions. Word has length 62 [2018-12-09 04:03:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:03:08,834 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 111 transitions. [2018-12-09 04:03:08,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 04:03:08,834 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 111 transitions. [2018-12-09 04:03:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-09 04:03:08,835 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:03:08,835 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 04:03:08,836 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:03:08,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:03:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1483482771, now seen corresponding path program 5 times [2018-12-09 04:03:08,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:03:08,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:08,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:03:08,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:03:08,836 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:03:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:03:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-12-09 04:03:08,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:08,896 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:03:08,896 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:03:08,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:03:08,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:03:08,896 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:03:08,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 04:03:08,902 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 04:03:08,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-09 04:03:08,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:03:08,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:03:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2018-12-09 04:03:08,989 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:03:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-12-09 04:03:09,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 04:03:09,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 32 [2018-12-09 04:03:09,398 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:03:09,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-09 04:03:09,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-09 04:03:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2018-12-09 04:03:09,398 INFO L87 Difference]: Start difference. First operand 63 states and 111 transitions. Second operand 20 states. [2018-12-09 04:03:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:03:09,722 INFO L93 Difference]: Finished difference Result 103 states and 214 transitions. [2018-12-09 04:03:09,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-09 04:03:09,723 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2018-12-09 04:03:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:03:09,723 INFO L225 Difference]: With dead ends: 103 [2018-12-09 04:03:09,723 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 04:03:09,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2018-12-09 04:03:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 04:03:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 04:03:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 04:03:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 04:03:09,724 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2018-12-09 04:03:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:03:09,725 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 04:03:09,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-09 04:03:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 04:03:09,725 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 04:03:09,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 04:03:09,928 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 04:03:09,928 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 04:03:09,929 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 04:03:09,929 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 04:03:09,929 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 04:03:09,929 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 04:03:09,929 INFO L448 ceAbstractionStarter]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2018-12-09 04:03:09,929 INFO L444 ceAbstractionStarter]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (or (< |ackermann_#in~m| 0) (<= 1 |ackermann_#in~m|))) [2018-12-09 04:03:09,929 INFO L451 ceAbstractionStarter]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2018-12-09 04:03:09,929 INFO L448 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2018-12-09 04:03:09,929 INFO L444 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|))) [2018-12-09 04:03:09,929 INFO L444 ceAbstractionStarter]: At program point L22-2(line 22) the Hoare annotation is: (and (< 0 |ackermann_#in~m|) (= ackermann_~m |ackermann_#in~m|) (<= |ackermann_#in~n| ackermann_~n) (<= 2 |ackermann_#t~ret1|)) [2018-12-09 04:03:09,929 INFO L448 ceAbstractionStarter]: For program point L19(lines 19 21) no Hoare annotation was computed. [2018-12-09 04:03:09,929 INFO L448 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-12-09 04:03:09,929 INFO L448 ceAbstractionStarter]: For program point L22-3(line 22) no Hoare annotation was computed. [2018-12-09 04:03:09,929 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-12-09 04:03:09,930 INFO L448 ceAbstractionStarter]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2018-12-09 04:03:09,930 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 26 46) the Hoare annotation is: true [2018-12-09 04:03:09,930 INFO L448 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2018-12-09 04:03:09,930 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 26 46) no Hoare annotation was computed. [2018-12-09 04:03:09,930 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2018-12-09 04:03:09,930 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 26 46) no Hoare annotation was computed. [2018-12-09 04:03:09,930 INFO L448 ceAbstractionStarter]: For program point L44(line 44) no Hoare annotation was computed. [2018-12-09 04:03:09,930 INFO L448 ceAbstractionStarter]: For program point L41(lines 41 45) no Hoare annotation was computed. [2018-12-09 04:03:09,930 INFO L444 ceAbstractionStarter]: At program point L40(line 40) the Hoare annotation is: (<= 0 main_~n~0) [2018-12-09 04:03:09,930 INFO L448 ceAbstractionStarter]: For program point L40-1(line 40) no Hoare annotation was computed. [2018-12-09 04:03:09,930 INFO L448 ceAbstractionStarter]: For program point L34(lines 34 39) no Hoare annotation was computed. [2018-12-09 04:03:09,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:03:09 BoogieIcfgContainer [2018-12-09 04:03:09,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 04:03:09,933 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 04:03:09,933 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 04:03:09,933 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 04:03:09,933 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:03:03" (3/4) ... [2018-12-09 04:03:09,935 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 04:03:09,939 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 04:03:09,940 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2018-12-09 04:03:09,940 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 04:03:09,943 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-09 04:03:09,943 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-09 04:03:09,943 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 04:03:09,973 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b7b90dd6-18a7-4e9d-9e79-c0434272e920/bin-2019/utaipan/witness.graphml [2018-12-09 04:03:09,973 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 04:03:09,974 INFO L168 Benchmark]: Toolchain (without parser) took 6795.43 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 563.6 MB). Free memory was 950.8 MB in the beginning and 833.0 MB in the end (delta: 117.7 MB). Peak memory consumption was 681.3 MB. Max. memory is 11.5 GB. [2018-12-09 04:03:09,975 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 04:03:09,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 117.77 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 04:03:09,976 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.62 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 04:03:09,976 INFO L168 Benchmark]: Boogie Preprocessor took 10.66 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 04:03:09,976 INFO L168 Benchmark]: RCFGBuilder took 153.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2018-12-09 04:03:09,977 INFO L168 Benchmark]: TraceAbstraction took 6458.42 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 429.9 MB). Free memory was 1.1 GB in the beginning and 833.0 MB in the end (delta: 280.8 MB). Peak memory consumption was 710.7 MB. Max. memory is 11.5 GB. [2018-12-09 04:03:09,977 INFO L168 Benchmark]: Witness Printer took 40.82 ms. Allocated memory is still 1.6 GB. Free memory is still 833.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 04:03:09,979 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 117.77 ms. Allocated memory is still 1.0 GB. Free memory was 950.8 MB in the beginning and 940.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.62 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.66 ms. Allocated memory is still 1.0 GB. Free memory is still 940.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 153.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 940.0 MB in the beginning and 1.1 GB in the end (delta: -173.8 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6458.42 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 429.9 MB). Free memory was 1.1 GB in the beginning and 833.0 MB in the end (delta: 280.8 MB). Peak memory consumption was 710.7 MB. Max. memory is 11.5 GB. * Witness Printer took 40.82 ms. Allocated memory is still 1.6 GB. Free memory is still 833.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 6.4s OverallTime, 8 OverallIterations, 10 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 167 SDtfs, 176 SDslu, 825 SDs, 0 SdLazy, 1424 SolverSat, 279 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 742 GetRequests, 546 SyntacticMatches, 23 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.3s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 113 PreInvPairs, 130 NumberOfFragments, 57 HoareAnnotationTreeSize, 113 FomulaSimplifications, 501 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 579 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 627 NumberOfCodeBlocks, 574 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 911 ConstructedInterpolants, 0 QuantifiedInterpolants, 87891 SizeOfPredicates, 25 NumberOfNonLiveVariables, 747 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 1189/1428 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...