./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/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_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/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 307542ef0214b83df72c59e51df6e57e6557ac8b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 21:24:08,941 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 21:24:08,943 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 21:24:08,958 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 21:24:08,959 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 21:24:08,961 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 21:24:08,962 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 21:24:08,964 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 21:24:08,967 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 21:24:08,968 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 21:24:08,972 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 21:24:08,972 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 21:24:08,973 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 21:24:08,974 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 21:24:08,975 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 21:24:08,979 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 21:24:08,980 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 21:24:08,982 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 21:24:08,993 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 21:24:08,994 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 21:24:08,995 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 21:24:08,998 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 21:24:09,000 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 21:24:09,000 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 21:24:09,000 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 21:24:09,001 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 21:24:09,002 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 21:24:09,003 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 21:24:09,003 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 21:24:09,005 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 21:24:09,005 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 21:24:09,006 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 21:24:09,006 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 21:24:09,006 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 21:24:09,007 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 21:24:09,008 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 21:24:09,009 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 21:24:09,027 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 21:24:09,027 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 21:24:09,028 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 21:24:09,028 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 21:24:09,029 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 21:24:09,029 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 21:24:09,029 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 21:24:09,029 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 21:24:09,029 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 21:24:09,029 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 21:24:09,030 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 21:24:09,030 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 21:24:09,030 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 21:24:09,031 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 21:24:09,031 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 21:24:09,031 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 21:24:09,031 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 21:24:09,031 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 21:24:09,037 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 21:24:09,037 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 21:24:09,037 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 21:24:09,037 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 21:24:09,038 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 21:24:09,038 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 21:24:09,038 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 21:24:09,038 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 21:24:09,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:24:09,038 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 21:24:09,039 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 21:24:09,039 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 21:24:09,039 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 21:24:09,039 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 21:24:09,039 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 21:24:09,039 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 21:24:09,040 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_3093720d-7be3-4874-ba1c-714107d4ab07/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 -> 307542ef0214b83df72c59e51df6e57e6557ac8b [2018-10-26 21:24:09,097 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 21:24:09,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 21:24:09,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 21:24:09,113 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 21:24:09,113 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 21:24:09,114 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/../../sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c [2018-10-26 21:24:09,164 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/data/1fee163b6/936e2abccb15464a82a17b45da5c8a4e/FLAGc9ae0c37b [2018-10-26 21:24:09,558 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 21:24:09,559 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/sv-benchmarks/c/recursive/Ackermann04_true-unreach-call_true-no-overflow.c [2018-10-26 21:24:09,564 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/data/1fee163b6/936e2abccb15464a82a17b45da5c8a4e/FLAGc9ae0c37b [2018-10-26 21:24:09,577 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/data/1fee163b6/936e2abccb15464a82a17b45da5c8a4e [2018-10-26 21:24:09,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 21:24:09,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 21:24:09,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 21:24:09,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 21:24:09,588 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 21:24:09,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21fd0115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09, skipping insertion in model container [2018-10-26 21:24:09,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 21:24:09,613 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 21:24:09,753 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:24:09,756 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 21:24:09,771 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 21:24:09,785 INFO L193 MainTranslator]: Completed translation [2018-10-26 21:24:09,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09 WrapperNode [2018-10-26 21:24:09,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 21:24:09,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 21:24:09,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 21:24:09,786 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 21:24:09,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 21:24:09,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 21:24:09,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 21:24:09,808 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 21:24:09,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... [2018-10-26 21:24:09,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 21:24:09,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 21:24:09,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 21:24:09,827 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 21:24:09,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 21:24:09,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 21:24:09,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 21:24:09,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 21:24:09,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 21:24:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 21:24:09,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 21:24:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2018-10-26 21:24:09,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2018-10-26 21:24:10,339 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 21:24:10,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:24:10 BoogieIcfgContainer [2018-10-26 21:24:10,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 21:24:10,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 21:24:10,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 21:24:10,344 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 21:24:10,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:24:09" (1/3) ... [2018-10-26 21:24:10,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2734bdc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:24:10, skipping insertion in model container [2018-10-26 21:24:10,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:24:09" (2/3) ... [2018-10-26 21:24:10,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2734bdc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:24:10, skipping insertion in model container [2018-10-26 21:24:10,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:24:10" (3/3) ... [2018-10-26 21:24:10,347 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04_true-unreach-call_true-no-overflow.c [2018-10-26 21:24:10,358 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 21:24:10,365 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 21:24:10,377 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 21:24:10,409 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 21:24:10,409 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 21:24:10,410 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 21:24:10,410 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 21:24:10,410 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 21:24:10,410 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 21:24:10,410 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 21:24:10,411 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 21:24:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-10-26 21:24:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-26 21:24:10,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:10,441 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:10,443 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:10,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1560979177, now seen corresponding path program 1 times [2018-10-26 21:24:10,457 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:10,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:10,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:10,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:10,510 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 21:24:10,835 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 21:24:10,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-26 21:24:10,835 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 21:24:10,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:24:10,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:24:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-26 21:24:10,854 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2018-10-26 21:24:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:11,049 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2018-10-26 21:24:11,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:24:11,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-26 21:24:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:11,061 INFO L225 Difference]: With dead ends: 55 [2018-10-26 21:24:11,062 INFO L226 Difference]: Without dead ends: 28 [2018-10-26 21:24:11,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 21:24:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-26 21:24:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-26 21:24:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-26 21:24:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2018-10-26 21:24:11,113 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2018-10-26 21:24:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:11,113 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2018-10-26 21:24:11,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:24:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2018-10-26 21:24:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-26 21:24:11,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:11,117 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:11,117 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:11,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:11,118 INFO L82 PathProgramCache]: Analyzing trace with hash -649197850, now seen corresponding path program 1 times [2018-10-26 21:24:11,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:11,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:11,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:11,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:11,119 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 21:24:11,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:11,292 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:24:11,293 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-10-26 21:24:11,295 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [20], [23], [26], [27], [30], [32], [38], [39], [40], [41], [43], [44], [45], [46] [2018-10-26 21:24:11,347 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 21:24:11,347 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 21:24:11,531 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 21:24:11,532 INFO L272 AbstractInterpreter]: Visited 20 different actions 27 times. Merged at 2 different actions 2 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-10-26 21:24:11,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:11,561 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 21:24:11,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:11,561 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:11,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:11,570 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 21:24:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:11,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 21:24:11,628 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 21:24:11,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:24:11,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-10-26 21:24:11,990 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:24:11,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 21:24:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 21:24:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-10-26 21:24:11,992 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2018-10-26 21:24:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:12,219 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2018-10-26 21:24:12,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 21:24:12,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-10-26 21:24:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:12,222 INFO L225 Difference]: With dead ends: 52 [2018-10-26 21:24:12,222 INFO L226 Difference]: Without dead ends: 30 [2018-10-26 21:24:12,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-26 21:24:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-26 21:24:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-26 21:24:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-26 21:24:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2018-10-26 21:24:12,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2018-10-26 21:24:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:12,234 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2018-10-26 21:24:12,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 21:24:12,234 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2018-10-26 21:24:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-26 21:24:12,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:12,237 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:12,237 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:12,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash 84169022, now seen corresponding path program 1 times [2018-10-26 21:24:12,238 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:12,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:12,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:12,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:12,239 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-26 21:24:12,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:12,371 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:24:12,372 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-10-26 21:24:12,372 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [20], [23], [26], [27], [30], [32], [33], [35], [37], [38], [39], [40], [41], [43], [44], [45], [46], [47], [48], [49], [50] [2018-10-26 21:24:12,374 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 21:24:12,374 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 21:24:19,943 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 21:24:19,943 INFO L272 AbstractInterpreter]: Visited 27 different actions 16252 times. Merged at 7 different actions 1584 times. Widened at 2 different actions 733 times. Found 849 fixpoints after 7 different actions. Largest state had 8 variables. [2018-10-26 21:24:19,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:19,996 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 21:24:19,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:19,996 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 21:24:20,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:20,014 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:20,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-26 21:24:20,383 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-26 21:24:21,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:24:21,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2018-10-26 21:24:21,030 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:24:21,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 21:24:21,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 21:24:21,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-10-26 21:24:21,031 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 11 states. [2018-10-26 21:24:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:21,791 INFO L93 Difference]: Finished difference Result 87 states and 149 transitions. [2018-10-26 21:24:21,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 21:24:21,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-10-26 21:24:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:21,799 INFO L225 Difference]: With dead ends: 87 [2018-10-26 21:24:21,799 INFO L226 Difference]: Without dead ends: 79 [2018-10-26 21:24:21,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2018-10-26 21:24:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-26 21:24:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-26 21:24:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-26 21:24:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2018-10-26 21:24:21,824 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 35 [2018-10-26 21:24:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:21,824 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2018-10-26 21:24:21,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 21:24:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2018-10-26 21:24:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-26 21:24:21,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:21,830 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:21,831 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:21,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:21,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2037912247, now seen corresponding path program 2 times [2018-10-26 21:24:21,831 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:21,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:21,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:21,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:21,833 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-10-26 21:24:22,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:22,128 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:24:22,128 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:24:22,128 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:24:22,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:22,129 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:22,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:24:22,147 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 21:24:22,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-26 21:24:22,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:24:22,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2018-10-26 21:24:22,279 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:22,665 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 21:24:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 105 proven. 13 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-10-26 21:24:22,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:24:22,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 16 [2018-10-26 21:24:22,982 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:24:22,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 21:24:22,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 21:24:22,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-10-26 21:24:22,983 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 9 states. [2018-10-26 21:24:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:23,257 INFO L93 Difference]: Finished difference Result 160 states and 365 transitions. [2018-10-26 21:24:23,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 21:24:23,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 82 [2018-10-26 21:24:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:23,264 INFO L225 Difference]: With dead ends: 160 [2018-10-26 21:24:23,264 INFO L226 Difference]: Without dead ends: 89 [2018-10-26 21:24:23,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-10-26 21:24:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-26 21:24:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-10-26 21:24:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-26 21:24:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 150 transitions. [2018-10-26 21:24:23,290 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 150 transitions. Word has length 82 [2018-10-26 21:24:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:23,291 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 150 transitions. [2018-10-26 21:24:23,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 21:24:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 150 transitions. [2018-10-26 21:24:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-26 21:24:23,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:23,300 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 14, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:23,300 INFO L424 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:23,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash 941287577, now seen corresponding path program 3 times [2018-10-26 21:24:23,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:23,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:23,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:24:23,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:23,302 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 433 proven. 35 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2018-10-26 21:24:23,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:23,476 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:24:23,477 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:24:23,477 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:24:23,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:23,478 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:23,490 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:24:23,491 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 21:24:23,552 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:24:23,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:24:23,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 268 proven. 468 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2018-10-26 21:24:23,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:24,481 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-26 21:24:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 268 proven. 502 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2018-10-26 21:24:26,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:24:26,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 15] total 18 [2018-10-26 21:24:26,288 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:24:26,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 21:24:26,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 21:24:26,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2018-10-26 21:24:26,289 INFO L87 Difference]: Start difference. First operand 85 states and 150 transitions. Second operand 12 states. [2018-10-26 21:24:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:26,615 INFO L93 Difference]: Finished difference Result 172 states and 407 transitions. [2018-10-26 21:24:26,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 21:24:26,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 161 [2018-10-26 21:24:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:26,621 INFO L225 Difference]: With dead ends: 172 [2018-10-26 21:24:26,621 INFO L226 Difference]: Without dead ends: 82 [2018-10-26 21:24:26,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 295 SyntacticMatches, 23 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2018-10-26 21:24:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-26 21:24:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-26 21:24:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-26 21:24:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 146 transitions. [2018-10-26 21:24:26,641 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 146 transitions. Word has length 161 [2018-10-26 21:24:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:26,645 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 146 transitions. [2018-10-26 21:24:26,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 21:24:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 146 transitions. [2018-10-26 21:24:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-26 21:24:26,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:26,649 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:26,649 INFO L424 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:26,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1285391477, now seen corresponding path program 4 times [2018-10-26 21:24:26,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:26,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:26,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:24:26,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:26,651 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 103 proven. 171 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-10-26 21:24:26,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:26,877 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:24:26,877 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:24:26,878 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:24:26,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:26,878 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:26,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:26,885 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 21:24:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:26,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 286 proven. 71 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-26 21:24:26,976 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:27,487 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-10-26 21:24:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 121 proven. 161 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2018-10-26 21:24:28,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:24:28,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 22 [2018-10-26 21:24:28,592 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:24:28,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 21:24:28,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 21:24:28,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2018-10-26 21:24:28,593 INFO L87 Difference]: Start difference. First operand 82 states and 146 transitions. Second operand 13 states. [2018-10-26 21:24:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:29,180 INFO L93 Difference]: Finished difference Result 150 states and 285 transitions. [2018-10-26 21:24:29,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 21:24:29,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 108 [2018-10-26 21:24:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:29,182 INFO L225 Difference]: With dead ends: 150 [2018-10-26 21:24:29,182 INFO L226 Difference]: Without dead ends: 85 [2018-10-26 21:24:29,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 202 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 21:24:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-26 21:24:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2018-10-26 21:24:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-26 21:24:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 138 transitions. [2018-10-26 21:24:29,197 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 138 transitions. Word has length 108 [2018-10-26 21:24:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:29,198 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 138 transitions. [2018-10-26 21:24:29,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 21:24:29,198 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 138 transitions. [2018-10-26 21:24:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-26 21:24:29,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:29,203 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:29,203 INFO L424 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:29,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash -536332241, now seen corresponding path program 5 times [2018-10-26 21:24:29,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:29,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:29,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:29,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:29,204 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 139 proven. 297 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2018-10-26 21:24:29,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:29,799 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:24:29,799 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:24:29,799 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:24:29,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:29,799 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:29,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:24:29,808 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 21:24:29,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-26 21:24:29,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:24:29,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 298 proven. 160 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2018-10-26 21:24:29,920 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:30,928 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 21:24:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 328 proven. 153 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-10-26 21:24:32,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:24:32,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 21] total 28 [2018-10-26 21:24:32,307 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:24:32,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 21:24:32,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 21:24:32,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2018-10-26 21:24:32,308 INFO L87 Difference]: Start difference. First operand 82 states and 138 transitions. Second operand 17 states. [2018-10-26 21:24:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:32,858 INFO L93 Difference]: Finished difference Result 176 states and 334 transitions. [2018-10-26 21:24:32,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 21:24:32,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 134 [2018-10-26 21:24:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:32,864 INFO L225 Difference]: With dead ends: 176 [2018-10-26 21:24:32,864 INFO L226 Difference]: Without dead ends: 111 [2018-10-26 21:24:32,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 243 SyntacticMatches, 18 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2018-10-26 21:24:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-26 21:24:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2018-10-26 21:24:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-26 21:24:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 177 transitions. [2018-10-26 21:24:32,887 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 177 transitions. Word has length 134 [2018-10-26 21:24:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:32,889 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 177 transitions. [2018-10-26 21:24:32,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 21:24:32,889 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 177 transitions. [2018-10-26 21:24:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-26 21:24:32,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:32,891 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:32,893 INFO L424 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:32,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1071102645, now seen corresponding path program 6 times [2018-10-26 21:24:32,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:32,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:32,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:24:32,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:32,895 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-10-26 21:24:33,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:33,192 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:24:33,192 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:24:33,192 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:24:33,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:33,192 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:33,279 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 21:24:33,280 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-26 21:24:33,323 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 21:24:33,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:24:33,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-10-26 21:24:33,365 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2018-10-26 21:24:36,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:24:36,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 27] total 33 [2018-10-26 21:24:36,682 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:24:36,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 21:24:36,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 21:24:36,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 21:24:36,683 INFO L87 Difference]: Start difference. First operand 102 states and 177 transitions. Second operand 20 states. [2018-10-26 21:24:36,993 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-26 21:24:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:37,608 INFO L93 Difference]: Finished difference Result 216 states and 419 transitions. [2018-10-26 21:24:37,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 21:24:37,612 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 160 [2018-10-26 21:24:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:37,615 INFO L225 Difference]: With dead ends: 216 [2018-10-26 21:24:37,618 INFO L226 Difference]: Without dead ends: 131 [2018-10-26 21:24:37,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 295 SyntacticMatches, 25 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 21:24:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-26 21:24:37,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2018-10-26 21:24:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-26 21:24:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 221 transitions. [2018-10-26 21:24:37,665 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 221 transitions. Word has length 160 [2018-10-26 21:24:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:37,665 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 221 transitions. [2018-10-26 21:24:37,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 21:24:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 221 transitions. [2018-10-26 21:24:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-26 21:24:37,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:37,672 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:37,672 INFO L424 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:37,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:37,672 INFO L82 PathProgramCache]: Analyzing trace with hash -796269959, now seen corresponding path program 7 times [2018-10-26 21:24:37,673 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:37,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:37,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 21:24:37,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:37,674 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2018-10-26 21:24:38,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:38,606 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:24:38,606 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:24:38,606 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:24:38,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:38,607 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:38,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:38,615 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 21:24:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:38,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2018-10-26 21:24:38,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:38,915 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-10-26 21:24:40,624 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-26 21:24:40,760 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-26 21:24:40,916 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 21:24:42,264 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 21:24:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-10-26 21:24:42,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:24:42,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 28] total 30 [2018-10-26 21:24:42,883 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:24:42,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 21:24:42,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 21:24:42,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2018-10-26 21:24:42,887 INFO L87 Difference]: Start difference. First operand 121 states and 221 transitions. Second operand 21 states. [2018-10-26 21:24:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:43,531 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2018-10-26 21:24:43,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 21:24:43,536 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 173 [2018-10-26 21:24:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:43,543 INFO L225 Difference]: With dead ends: 250 [2018-10-26 21:24:43,543 INFO L226 Difference]: Without dead ends: 146 [2018-10-26 21:24:43,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 319 SyntacticMatches, 32 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=867, Invalid=3293, Unknown=0, NotChecked=0, Total=4160 [2018-10-26 21:24:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-26 21:24:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2018-10-26 21:24:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-26 21:24:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 257 transitions. [2018-10-26 21:24:43,570 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 257 transitions. Word has length 173 [2018-10-26 21:24:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:43,570 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 257 transitions. [2018-10-26 21:24:43,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 21:24:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 257 transitions. [2018-10-26 21:24:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-26 21:24:43,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 21:24:43,575 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 21:24:43,575 INFO L424 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 21:24:43,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 21:24:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash -470648935, now seen corresponding path program 8 times [2018-10-26 21:24:43,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 21:24:43,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:43,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 21:24:43,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 21:24:43,578 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 21:24:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 21:24:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-10-26 21:24:43,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:43,971 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 21:24:43,971 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-26 21:24:43,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-26 21:24:43,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 21:24:43,971 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 21:24:43,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 21:24:43,980 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-26 21:24:44,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 21:24:44,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 21:24:44,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 21:24:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2018-10-26 21:24:44,047 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 21:24:44,267 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-26 21:24:45,553 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-10-26 21:24:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2018-10-26 21:24:49,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 21:24:49,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 33] total 35 [2018-10-26 21:24:49,990 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 21:24:49,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 21:24:49,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 21:24:49,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 21:24:49,991 INFO L87 Difference]: Start difference. First operand 136 states and 257 transitions. Second operand 23 states. [2018-10-26 21:24:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 21:24:50,416 INFO L93 Difference]: Finished difference Result 165 states and 304 transitions. [2018-10-26 21:24:50,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 21:24:50,417 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2018-10-26 21:24:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 21:24:50,418 INFO L225 Difference]: With dead ends: 165 [2018-10-26 21:24:50,418 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 21:24:50,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 347 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=529, Invalid=2663, Unknown=0, NotChecked=0, Total=3192 [2018-10-26 21:24:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 21:24:50,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 21:24:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 21:24:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 21:24:50,422 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 186 [2018-10-26 21:24:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 21:24:50,422 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 21:24:50,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 21:24:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 21:24:50,422 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 21:24:50,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 21:24:50,597 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:50,636 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:50,668 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:50,697 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:50,730 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:50,805 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:50,863 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:50,962 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:50,965 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,022 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,038 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,041 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,054 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,057 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,104 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,106 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,127 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,129 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-26 21:24:51,263 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2018-10-26 21:24:52,076 WARN L179 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 13 [2018-10-26 21:24:56,037 WARN L179 SmtUtils]: Spent 3.96 s on a formula simplification. DAG size of input: 89 DAG size of output: 37 [2018-10-26 21:24:56,120 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-26 21:24:56,120 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-26 21:24:56,120 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-26 21:24:56,121 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-26 21:24:56,121 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-26 21:24:56,121 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-26 21:24:56,121 INFO L425 ceAbstractionStarter]: For program point L33(lines 33 38) no Hoare annotation was computed. [2018-10-26 21:24:56,121 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2018-10-26 21:24:56,121 INFO L425 ceAbstractionStarter]: For program point L27(lines 27 31) no Hoare annotation was computed. [2018-10-26 21:24:56,121 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2018-10-26 21:24:56,121 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2018-10-26 21:24:56,121 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2018-10-26 21:24:56,121 INFO L425 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2018-10-26 21:24:56,121 INFO L425 ceAbstractionStarter]: For program point L40(lines 40 44) no Hoare annotation was computed. [2018-10-26 21:24:56,122 INFO L428 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: true [2018-10-26 21:24:56,122 INFO L425 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2018-10-26 21:24:56,122 INFO L425 ceAbstractionStarter]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2018-10-26 21:24:56,122 INFO L428 ceAbstractionStarter]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2018-10-26 21:24:56,122 INFO L421 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~m| ackermann_~m) (<= |ackermann_#in~n| ackermann_~n) (or (< |ackermann_#in~m| 0) (< 0 |ackermann_#in~m|))) [2018-10-26 21:24:56,122 INFO L425 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2018-10-26 21:24:56,122 INFO L421 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (and (<= |ackermann_#in~n| 0) (= |ackermann_#in~m| ackermann_~m) (<= |ackermann_#in~n| ackermann_~n)) [2018-10-26 21:24:56,122 INFO L421 ceAbstractionStarter]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse2 (<= 6 |ackermann_#t~ret1|)) (.cse1 (<= |ackermann_#in~m| 1)) (.cse4 (<= |ackermann_#in~n| 2))) (and (let ((.cse0 (<= |ackermann_#in~n| 1)) (.cse3 (<= 3 |ackermann_#t~ret1|))) (or (and (<= 5 |ackermann_#t~ret1|) (<= |ackermann_#in~m| 2)) (and .cse0 .cse1 (<= 2 |ackermann_#t~ret1|)) .cse2 (and .cse3 .cse0) (and (<= 4 |ackermann_#t~ret1|) (<= |ackermann_#in~n| 3) .cse1) (and .cse3 .cse4 .cse1))) (let ((.cse5 (<= 1 |ackermann_#in~m|)) (.cse6 (= |ackermann_#in~m| ackermann_~m)) (.cse7 (<= |ackermann_#in~n| ackermann_~n))) (or (and .cse5 .cse6 .cse7 .cse2) (and .cse5 .cse6 .cse7 (<= |ackermann_#in~n| 4) .cse1) (and .cse6 .cse4 .cse7 (<= 2 |ackermann_#in~m|)))))) [2018-10-26 21:24:56,122 INFO L425 ceAbstractionStarter]: For program point L18(lines 18 20) no Hoare annotation was computed. [2018-10-26 21:24:56,122 INFO L425 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-10-26 21:24:56,123 INFO L425 ceAbstractionStarter]: For program point L21-3(line 21) no Hoare annotation was computed. [2018-10-26 21:24:56,123 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-10-26 21:24:56,123 INFO L425 ceAbstractionStarter]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2018-10-26 21:24:56,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 09:24:56 BoogieIcfgContainer [2018-10-26 21:24:56,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 21:24:56,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 21:24:56,134 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 21:24:56,134 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 21:24:56,134 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:24:10" (3/4) ... [2018-10-26 21:24:56,139 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-26 21:24:56,144 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-26 21:24:56,144 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-26 21:24:56,144 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2018-10-26 21:24:56,148 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-10-26 21:24:56,149 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-26 21:24:56,149 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-26 21:24:56,194 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_3093720d-7be3-4874-ba1c-714107d4ab07/bin-2019/utaipan/witness.graphml [2018-10-26 21:24:56,194 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 21:24:56,195 INFO L168 Benchmark]: Toolchain (without parser) took 46613.79 ms. Allocated memory was 1.0 GB in the beginning and 2.4 GB in the end (delta: 1.3 GB). Free memory was 954.5 MB in the beginning and 2.0 GB in the end (delta: -1.1 GB). Peak memory consumption was 236.7 MB. Max. memory is 11.5 GB. [2018-10-26 21:24:56,195 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-10-26 21:24:56,196 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.79 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 942.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-10-26 21:24:56,196 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.34 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:24:56,199 INFO L168 Benchmark]: Boogie Preprocessor took 18.52 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 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. [2018-10-26 21:24:56,199 INFO L168 Benchmark]: RCFGBuilder took 512.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -205.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2018-10-26 21:24:56,200 INFO L168 Benchmark]: TraceAbstraction took 45793.42 ms. Allocated memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: 1.2 GB). Free memory was 1.1 GB in the beginning and 2.0 GB in the end (delta: -896.2 MB). Peak memory consumption was 1.5 GB. Max. memory is 11.5 GB. [2018-10-26 21:24:56,200 INFO L168 Benchmark]: Witness Printer took 60.07 ms. Allocated memory is still 2.4 GB. Free memory is still 2.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 21:24:56,202 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 202.79 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 942.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.34 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.52 ms. Allocated memory is still 1.0 GB. Free memory was 942.4 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 512.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 939.7 MB in the beginning and 1.1 GB in the end (delta: -205.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 45793.42 ms. Allocated memory was 1.2 GB in the beginning and 2.4 GB in the end (delta: 1.2 GB). Free memory was 1.1 GB in the beginning and 2.0 GB in the end (delta: -896.2 MB). Peak memory consumption was 1.5 GB. Max. memory is 11.5 GB. * Witness Printer took 60.07 ms. Allocated memory is still 2.4 GB. Free memory is still 2.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 45.7s OverallTime, 10 OverallIterations, 27 TraceHistogramMax, 5.0s AutomataDifference, 0.0s DeadEndRemovalTime, 5.6s HoareAnnotationTime, HoareTripleCheckerStatistics: 279 SDtfs, 220 SDslu, 1299 SDs, 0 SdLazy, 2759 SolverSat, 522 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2466 GetRequests, 1972 SyntacticMatches, 146 SemanticMatches, 348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4226 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.8s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 36 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 529 PreInvPairs, 1133 NumberOfFragments, 124 HoareAnnotationTreeSize, 529 FomulaSimplifications, 15481 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 9 FomulaSimplificationsInter, 6354 FormulaSimplificationTreeSizeReductionInter, 4.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 25.4s InterpolantComputationTime, 2137 NumberOfCodeBlocks, 1988 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 3170 ConstructedInterpolants, 0 QuantifiedInterpolants, 882896 SizeOfPredicates, 74 NumberOfNonLiveVariables, 2673 ConjunctsInSsa, 203 ConjunctsInUnsatCore, 28 InterpolantComputations, 1 PerfectInterpolantSequences, 17724/22056 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...