./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/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 595c6555624af5bbcf79585a20acb2500e3eeee8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-03 00:04:37,904 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-03 00:04:37,906 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-03 00:04:37,913 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-03 00:04:37,913 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-03 00:04:37,914 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-03 00:04:37,915 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-03 00:04:37,916 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-03 00:04:37,917 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-03 00:04:37,918 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-03 00:04:37,918 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-03 00:04:37,918 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-03 00:04:37,919 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-03 00:04:37,920 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-03 00:04:37,920 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-03 00:04:37,921 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-03 00:04:37,922 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-03 00:04:37,923 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-03 00:04:37,924 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-03 00:04:37,925 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-03 00:04:37,926 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-03 00:04:37,927 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-03 00:04:37,928 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-03 00:04:37,929 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-03 00:04:37,929 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-03 00:04:37,929 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-03 00:04:37,930 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-03 00:04:37,931 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-03 00:04:37,931 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-03 00:04:37,932 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-03 00:04:37,932 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-03 00:04:37,933 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-03 00:04:37,933 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-03 00:04:37,933 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-03 00:04:37,934 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-03 00:04:37,934 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-03 00:04:37,934 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-03 00:04:37,945 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-03 00:04:37,945 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-03 00:04:37,945 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-03 00:04:37,946 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-03 00:04:37,946 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-03 00:04:37,946 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-03 00:04:37,946 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-03 00:04:37,946 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-03 00:04:37,946 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-03 00:04:37,946 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-03 00:04:37,946 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-03 00:04:37,947 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-03 00:04:37,947 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-03 00:04:37,947 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-03 00:04:37,947 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-03 00:04:37,947 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-03 00:04:37,948 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-03 00:04:37,948 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-03 00:04:37,948 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-03 00:04:37,948 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-03 00:04:37,948 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-03 00:04:37,948 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-03 00:04:37,948 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-03 00:04:37,949 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-03 00:04:37,949 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-03 00:04:37,949 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-03 00:04:37,949 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-03 00:04:37,949 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-03 00:04:37,949 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 00:04:37,949 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-03 00:04:37,949 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-03 00:04:37,949 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-03 00:04:37,949 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-03 00:04:37,950 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-03 00:04:37,950 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-03 00:04:37,950 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-03 00:04:37,950 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_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/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 -> 595c6555624af5bbcf79585a20acb2500e3eeee8 [2018-12-03 00:04:37,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-03 00:04:37,981 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-03 00:04:37,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-03 00:04:37,985 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-03 00:04:37,986 INFO L276 PluginConnector]: CDTParser initialized [2018-12-03 00:04:37,986 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-12-03 00:04:38,033 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/data/cf84eb923/de86c0292dda4a919e8dc2dff5788386/FLAGd050a3f66 [2018-12-03 00:04:38,455 INFO L307 CDTParser]: Found 1 translation units. [2018-12-03 00:04:38,455 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/sv-benchmarks/c/recursive-simple/fibo_2calls_6_true-unreach-call_true-termination.c [2018-12-03 00:04:38,459 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/data/cf84eb923/de86c0292dda4a919e8dc2dff5788386/FLAGd050a3f66 [2018-12-03 00:04:38,466 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/data/cf84eb923/de86c0292dda4a919e8dc2dff5788386 [2018-12-03 00:04:38,468 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-03 00:04:38,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-03 00:04:38,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-03 00:04:38,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-03 00:04:38,471 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-03 00:04:38,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489644d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38, skipping insertion in model container [2018-12-03 00:04:38,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-03 00:04:38,489 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-03 00:04:38,581 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 00:04:38,583 INFO L191 MainTranslator]: Completed pre-run [2018-12-03 00:04:38,592 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-03 00:04:38,600 INFO L195 MainTranslator]: Completed translation [2018-12-03 00:04:38,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38 WrapperNode [2018-12-03 00:04:38,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-03 00:04:38,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-03 00:04:38,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-03 00:04:38,601 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-03 00:04:38,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-03 00:04:38,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-03 00:04:38,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-03 00:04:38,616 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-03 00:04:38,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... [2018-12-03 00:04:38,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-03 00:04:38,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-03 00:04:38,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-03 00:04:38,626 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-03 00:04:38,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-03 00:04:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-03 00:04:38,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-03 00:04:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-03 00:04:38,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-03 00:04:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-03 00:04:38,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-03 00:04:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2018-12-03 00:04:38,689 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2018-12-03 00:04:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2018-12-03 00:04:38,689 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2018-12-03 00:04:38,775 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-03 00:04:38,775 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-03 00:04:38,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:04:38 BoogieIcfgContainer [2018-12-03 00:04:38,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-03 00:04:38,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-03 00:04:38,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-03 00:04:38,778 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-03 00:04:38,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:04:38" (1/3) ... [2018-12-03 00:04:38,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9f4617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:04:38, skipping insertion in model container [2018-12-03 00:04:38,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:04:38" (2/3) ... [2018-12-03 00:04:38,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9f4617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:04:38, skipping insertion in model container [2018-12-03 00:04:38,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:04:38" (3/3) ... [2018-12-03 00:04:38,781 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6_true-unreach-call_true-termination.c [2018-12-03 00:04:38,787 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-03 00:04:38,792 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-03 00:04:38,801 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-03 00:04:38,827 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-03 00:04:38,828 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-03 00:04:38,828 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-03 00:04:38,828 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-03 00:04:38,828 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-03 00:04:38,828 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-03 00:04:38,828 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-03 00:04:38,828 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-03 00:04:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2018-12-03 00:04:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-03 00:04:38,848 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:38,849 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:38,850 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:38,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:38,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2018-12-03 00:04:38,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:38,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:38,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:38,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:38,888 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 00:04:38,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 00:04:38,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 00:04:38,962 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 00:04:38,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 00:04:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 00:04:38,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 00:04:38,973 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2018-12-03 00:04:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:39,038 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2018-12-03 00:04:39,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 00:04:39,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-03 00:04:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:39,046 INFO L225 Difference]: With dead ends: 44 [2018-12-03 00:04:39,046 INFO L226 Difference]: Without dead ends: 30 [2018-12-03 00:04:39,048 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-03 00:04:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-03 00:04:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-03 00:04:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 00:04:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-03 00:04:39,076 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2018-12-03 00:04:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:39,076 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-03 00:04:39,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 00:04:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-03 00:04:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-03 00:04:39,078 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:39,078 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:39,078 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:39,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:39,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2018-12-03 00:04:39,079 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:39,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:39,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:39,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:39,080 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-03 00:04:39,105 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-03 00:04:39,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-03 00:04:39,105 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 00:04:39,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-03 00:04:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-03 00:04:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-03 00:04:39,107 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2018-12-03 00:04:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:39,143 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2018-12-03 00:04:39,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-03 00:04:39,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-12-03 00:04:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:39,144 INFO L225 Difference]: With dead ends: 36 [2018-12-03 00:04:39,144 INFO L226 Difference]: Without dead ends: 32 [2018-12-03 00:04:39,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-03 00:04:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-03 00:04:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-03 00:04:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-03 00:04:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2018-12-03 00:04:39,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2018-12-03 00:04:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:39,149 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2018-12-03 00:04:39,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-03 00:04:39,149 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2018-12-03 00:04:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-03 00:04:39,149 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:39,149 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:39,150 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:39,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2018-12-03 00:04:39,150 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:39,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:39,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:39,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:39,151 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-03 00:04:39,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:39,191 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:39,191 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-03 00:04:39,192 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [31], [32], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [56], [57], [58], [59] [2018-12-03 00:04:39,212 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 00:04:39,212 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 00:04:39,273 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 00:04:39,274 INFO L272 AbstractInterpreter]: Visited 12 different actions 12 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 3. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 5 variables. [2018-12-03 00:04:39,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:39,278 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 00:04:39,305 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2018-12-03 00:04:39,305 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 00:04:39,323 INFO L418 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2018-12-03 00:04:39,324 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 00:04:39,324 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 00:04:39,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-12-03 00:04:39,324 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 00:04:39,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-03 00:04:39,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-03 00:04:39,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-03 00:04:39,325 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2018-12-03 00:04:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:39,440 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2018-12-03 00:04:39,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-03 00:04:39,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-12-03 00:04:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:39,441 INFO L225 Difference]: With dead ends: 72 [2018-12-03 00:04:39,441 INFO L226 Difference]: Without dead ends: 48 [2018-12-03 00:04:39,442 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-03 00:04:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-12-03 00:04:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2018-12-03 00:04:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-12-03 00:04:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2018-12-03 00:04:39,446 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 26 [2018-12-03 00:04:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:39,447 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2018-12-03 00:04:39,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-03 00:04:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2018-12-03 00:04:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-03 00:04:39,448 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:39,448 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:39,448 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:39,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:39,448 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2018-12-03 00:04:39,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:39,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:39,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:39,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:39,449 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-03 00:04:39,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:39,496 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:39,496 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-12-03 00:04:39,496 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [35], [36], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-03 00:04:39,497 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 00:04:39,497 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 00:04:39,562 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 00:04:39,562 INFO L272 AbstractInterpreter]: Visited 28 different actions 200 times. Never merged. Widened at 2 different actions 11 times. Performed 411 root evaluator evaluations with a maximum evaluation depth of 4. Performed 411 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 18 fixpoints after 6 different actions. Largest state had 5 variables. [2018-12-03 00:04:39,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:39,564 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 00:04:39,574 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 50% of their original sizes. [2018-12-03 00:04:39,575 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 00:04:39,604 INFO L418 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-12-03 00:04:39,604 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 00:04:39,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 00:04:39,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-12-03 00:04:39,604 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 00:04:39,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-03 00:04:39,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-03 00:04:39,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-12-03 00:04:39,605 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2018-12-03 00:04:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:39,757 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2018-12-03 00:04:39,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-03 00:04:39,757 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2018-12-03 00:04:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:39,758 INFO L225 Difference]: With dead ends: 87 [2018-12-03 00:04:39,759 INFO L226 Difference]: Without dead ends: 55 [2018-12-03 00:04:39,759 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-12-03 00:04:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-03 00:04:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-12-03 00:04:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-03 00:04:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2018-12-03 00:04:39,767 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2018-12-03 00:04:39,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:39,767 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2018-12-03 00:04:39,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-03 00:04:39,767 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2018-12-03 00:04:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-03 00:04:39,769 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:39,769 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:39,769 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:39,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2018-12-03 00:04:39,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:39,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:39,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:39,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:39,771 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-03 00:04:39,824 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:39,824 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:39,824 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:39,825 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:39,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:39,826 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 00:04:39,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 00:04:39,833 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 00:04:39,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 00:04:39,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 00:04:39,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-03 00:04:39,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-12-03 00:04:40,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:40,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2018-12-03 00:04:40,149 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:40,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-03 00:04:40,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-03 00:04:40,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-12-03 00:04:40,150 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 11 states. [2018-12-03 00:04:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:40,306 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2018-12-03 00:04:40,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 00:04:40,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2018-12-03 00:04:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:40,308 INFO L225 Difference]: With dead ends: 121 [2018-12-03 00:04:40,308 INFO L226 Difference]: Without dead ends: 76 [2018-12-03 00:04:40,309 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-12-03 00:04:40,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-12-03 00:04:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2018-12-03 00:04:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-03 00:04:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2018-12-03 00:04:40,318 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 52 [2018-12-03 00:04:40,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:40,319 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2018-12-03 00:04:40,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-03 00:04:40,319 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2018-12-03 00:04:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-03 00:04:40,320 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:40,320 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:40,320 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:40,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2018-12-03 00:04:40,321 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:40,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:40,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 00:04:40,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:40,322 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-03 00:04:40,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:40,371 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:40,371 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-12-03 00:04:40,371 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-03 00:04:40,372 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 00:04:40,372 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 00:04:40,985 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 00:04:40,985 INFO L272 AbstractInterpreter]: Visited 29 different actions 3929 times. Merged at 11 different actions 1050 times. Widened at 2 different actions 189 times. Performed 9241 root evaluator evaluations with a maximum evaluation depth of 4. Performed 9241 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 481 fixpoints after 9 different actions. Largest state had 5 variables. [2018-12-03 00:04:40,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:40,987 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 00:04:41,011 INFO L227 lantSequenceWeakener]: Weakened 16 states. On average, predicates are now at 56.25% of their original sizes. [2018-12-03 00:04:41,011 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 00:04:41,060 INFO L418 sIntCurrentIteration]: We unified 54 AI predicates to 54 [2018-12-03 00:04:41,060 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 00:04:41,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 00:04:41,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 18 [2018-12-03 00:04:41,060 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 00:04:41,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 00:04:41,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 00:04:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-12-03 00:04:41,061 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 13 states. [2018-12-03 00:04:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:41,358 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2018-12-03 00:04:41,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 00:04:41,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-12-03 00:04:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:41,360 INFO L225 Difference]: With dead ends: 118 [2018-12-03 00:04:41,360 INFO L226 Difference]: Without dead ends: 77 [2018-12-03 00:04:41,361 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-12-03 00:04:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-03 00:04:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-12-03 00:04:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-03 00:04:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2018-12-03 00:04:41,366 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2018-12-03 00:04:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:41,366 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2018-12-03 00:04:41,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 00:04:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2018-12-03 00:04:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-12-03 00:04:41,368 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:41,368 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:41,368 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:41,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1937391112, now seen corresponding path program 1 times [2018-12-03 00:04:41,368 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:41,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:41,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:41,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:41,369 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-12-03 00:04:41,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:41,410 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:41,410 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 81 with the following transitions: [2018-12-03 00:04:41,410 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-03 00:04:41,411 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 00:04:41,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 00:04:41,671 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-03 00:04:41,671 INFO L272 AbstractInterpreter]: Visited 29 different actions 2572 times. Merged at 11 different actions 587 times. Widened at 2 different actions 135 times. Performed 5789 root evaluator evaluations with a maximum evaluation depth of 4. Performed 5789 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 318 fixpoints after 9 different actions. Largest state had 5 variables. [2018-12-03 00:04:41,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:41,674 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-03 00:04:41,683 INFO L227 lantSequenceWeakener]: Weakened 13 states. On average, predicates are now at 50% of their original sizes. [2018-12-03 00:04:41,683 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-03 00:04:41,771 INFO L418 sIntCurrentIteration]: We unified 79 AI predicates to 79 [2018-12-03 00:04:41,771 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-03 00:04:41,771 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-03 00:04:41,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-12-03 00:04:41,772 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-03 00:04:41,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 00:04:41,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 00:04:41,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-12-03 00:04:41,773 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand 13 states. [2018-12-03 00:04:42,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:42,106 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2018-12-03 00:04:42,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-03 00:04:42,106 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2018-12-03 00:04:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:42,108 INFO L225 Difference]: With dead ends: 141 [2018-12-03 00:04:42,108 INFO L226 Difference]: Without dead ends: 86 [2018-12-03 00:04:42,108 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-12-03 00:04:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-03 00:04:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-12-03 00:04:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-03 00:04:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2018-12-03 00:04:42,117 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 80 [2018-12-03 00:04:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:42,118 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2018-12-03 00:04:42,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 00:04:42,118 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2018-12-03 00:04:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-12-03 00:04:42,120 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:42,120 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:42,120 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:42,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:42,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1541382103, now seen corresponding path program 1 times [2018-12-03 00:04:42,120 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:42,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:42,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:42,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:42,121 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-12-03 00:04:42,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:42,178 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:42,179 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 95 with the following transitions: [2018-12-03 00:04:42,179 INFO L205 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [35], [36], [39], [40], [42], [44], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2018-12-03 00:04:42,180 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-03 00:04:42,180 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-03 00:04:42,655 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-03 00:04:42,656 INFO L272 AbstractInterpreter]: Visited 34 different actions 4845 times. Merged at 16 different actions 1436 times. Widened at 2 different actions 189 times. Performed 11828 root evaluator evaluations with a maximum evaluation depth of 4. Performed 11828 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 615 fixpoints after 11 different actions. Largest state had 5 variables. [2018-12-03 00:04:42,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:42,661 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-03 00:04:42,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:42,661 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 00:04:42,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:42,670 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 00:04:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:42,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-12-03 00:04:42,749 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-12-03 00:04:43,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:43,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 13] total 17 [2018-12-03 00:04:43,261 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:43,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-03 00:04:43,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-03 00:04:43,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-12-03 00:04:43,263 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand 12 states. [2018-12-03 00:04:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:43,447 INFO L93 Difference]: Finished difference Result 212 states and 335 transitions. [2018-12-03 00:04:43,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-03 00:04:43,448 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 94 [2018-12-03 00:04:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:43,449 INFO L225 Difference]: With dead ends: 212 [2018-12-03 00:04:43,449 INFO L226 Difference]: Without dead ends: 134 [2018-12-03 00:04:43,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 167 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2018-12-03 00:04:43,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-12-03 00:04:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2018-12-03 00:04:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-12-03 00:04:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2018-12-03 00:04:43,459 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 94 [2018-12-03 00:04:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:43,459 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2018-12-03 00:04:43,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-03 00:04:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2018-12-03 00:04:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-12-03 00:04:43,460 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:43,461 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:43,461 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:43,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash 721741772, now seen corresponding path program 2 times [2018-12-03 00:04:43,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:43,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:43,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:43,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:43,462 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 72 proven. 54 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2018-12-03 00:04:43,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:43,534 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:43,534 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:43,534 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:43,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:43,534 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 00:04:43,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 00:04:43,540 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 00:04:43,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-03 00:04:43,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 00:04:43,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 17 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-12-03 00:04:43,593 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 78 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2018-12-03 00:04:43,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:43,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 18 [2018-12-03 00:04:43,836 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:43,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 00:04:43,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 00:04:43,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2018-12-03 00:04:43,837 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 15 states. [2018-12-03 00:04:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:44,144 INFO L93 Difference]: Finished difference Result 231 states and 386 transitions. [2018-12-03 00:04:44,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-03 00:04:44,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 110 [2018-12-03 00:04:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:44,146 INFO L225 Difference]: With dead ends: 231 [2018-12-03 00:04:44,146 INFO L226 Difference]: Without dead ends: 165 [2018-12-03 00:04:44,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 207 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2018-12-03 00:04:44,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-12-03 00:04:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2018-12-03 00:04:44,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-12-03 00:04:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 210 transitions. [2018-12-03 00:04:44,157 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 210 transitions. Word has length 110 [2018-12-03 00:04:44,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:44,157 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 210 transitions. [2018-12-03 00:04:44,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 00:04:44,157 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 210 transitions. [2018-12-03 00:04:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-12-03 00:04:44,159 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:44,159 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 13, 11, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:44,159 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:44,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:44,159 INFO L82 PathProgramCache]: Analyzing trace with hash -189273787, now seen corresponding path program 3 times [2018-12-03 00:04:44,159 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:44,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:44,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 00:04:44,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:44,160 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 234 proven. 21 refuted. 0 times theorem prover too weak. 1126 trivial. 0 not checked. [2018-12-03 00:04:44,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:44,253 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:44,253 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:44,253 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:44,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:44,253 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 00:04:44,260 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 00:04:44,260 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 00:04:44,290 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 00:04:44,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 00:04:44,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 185 proven. 205 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2018-12-03 00:04:44,404 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 183 proven. 215 refuted. 0 times theorem prover too weak. 983 trivial. 0 not checked. [2018-12-03 00:04:45,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:45,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 14] total 24 [2018-12-03 00:04:45,056 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:45,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-03 00:04:45,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-03 00:04:45,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2018-12-03 00:04:45,057 INFO L87 Difference]: Start difference. First operand 144 states and 210 transitions. Second operand 18 states. [2018-12-03 00:04:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:45,347 INFO L93 Difference]: Finished difference Result 322 states and 558 transitions. [2018-12-03 00:04:45,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-03 00:04:45,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 229 [2018-12-03 00:04:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:45,349 INFO L225 Difference]: With dead ends: 322 [2018-12-03 00:04:45,349 INFO L226 Difference]: Without dead ends: 175 [2018-12-03 00:04:45,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 433 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2018-12-03 00:04:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-12-03 00:04:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 156. [2018-12-03 00:04:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-12-03 00:04:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 233 transitions. [2018-12-03 00:04:45,359 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 233 transitions. Word has length 229 [2018-12-03 00:04:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:45,359 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 233 transitions. [2018-12-03 00:04:45,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-03 00:04:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 233 transitions. [2018-12-03 00:04:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-12-03 00:04:45,361 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:45,361 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 8, 8, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:45,361 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:45,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1397185591, now seen corresponding path program 4 times [2018-12-03 00:04:45,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:45,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:45,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 00:04:45,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:45,362 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 160 proven. 18 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2018-12-03 00:04:45,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:45,447 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:45,448 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:45,448 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:45,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:45,448 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 00:04:45,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:45,454 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 00:04:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:45,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 80 proven. 97 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2018-12-03 00:04:45,516 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 80 proven. 102 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-12-03 00:04:45,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:45,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 18 [2018-12-03 00:04:45,848 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:45,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-03 00:04:45,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-03 00:04:45,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2018-12-03 00:04:45,849 INFO L87 Difference]: Start difference. First operand 156 states and 233 transitions. Second operand 14 states. [2018-12-03 00:04:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:46,117 INFO L93 Difference]: Finished difference Result 363 states and 610 transitions. [2018-12-03 00:04:46,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-03 00:04:46,117 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 149 [2018-12-03 00:04:46,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:46,118 INFO L225 Difference]: With dead ends: 363 [2018-12-03 00:04:46,119 INFO L226 Difference]: Without dead ends: 192 [2018-12-03 00:04:46,120 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 283 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2018-12-03 00:04:46,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-12-03 00:04:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 149. [2018-12-03 00:04:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-12-03 00:04:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 206 transitions. [2018-12-03 00:04:46,127 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 206 transitions. Word has length 149 [2018-12-03 00:04:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:46,128 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 206 transitions. [2018-12-03 00:04:46,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-03 00:04:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 206 transitions. [2018-12-03 00:04:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-12-03 00:04:46,129 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:46,129 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:46,129 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:46,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:46,129 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 5 times [2018-12-03 00:04:46,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:46,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:46,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:46,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:46,130 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-12-03 00:04:46,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:46,454 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:46,454 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:46,454 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:46,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:46,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 00:04:46,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 00:04:46,461 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 00:04:46,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-12-03 00:04:46,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 00:04:46,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-12-03 00:04:46,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2018-12-03 00:04:47,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:47,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2018-12-03 00:04:47,505 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:47,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-03 00:04:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-03 00:04:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2018-12-03 00:04:47,506 INFO L87 Difference]: Start difference. First operand 149 states and 206 transitions. Second operand 36 states. [2018-12-03 00:04:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:47,826 INFO L93 Difference]: Finished difference Result 279 states and 438 transitions. [2018-12-03 00:04:47,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-03 00:04:47,826 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2018-12-03 00:04:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:47,828 INFO L225 Difference]: With dead ends: 279 [2018-12-03 00:04:47,828 INFO L226 Difference]: Without dead ends: 272 [2018-12-03 00:04:47,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 344 SyntacticMatches, 28 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2018-12-03 00:04:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-12-03 00:04:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 192. [2018-12-03 00:04:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-12-03 00:04:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 283 transitions. [2018-12-03 00:04:47,842 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 283 transitions. Word has length 177 [2018-12-03 00:04:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:47,842 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 283 transitions. [2018-12-03 00:04:47,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-03 00:04:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 283 transitions. [2018-12-03 00:04:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-12-03 00:04:47,844 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:47,844 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:47,844 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:47,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 6 times [2018-12-03 00:04:47,844 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:47,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:47,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 00:04:47,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:47,845 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 267 proven. 35 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2018-12-03 00:04:47,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:47,946 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:47,946 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:47,946 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:47,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:47,946 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 00:04:47,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 00:04:47,953 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 00:04:47,975 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 00:04:47,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 00:04:47,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 211 proven. 47 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2018-12-03 00:04:48,047 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 210 proven. 52 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2018-12-03 00:04:48,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:48,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 12] total 23 [2018-12-03 00:04:48,489 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:48,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-03 00:04:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-03 00:04:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2018-12-03 00:04:48,490 INFO L87 Difference]: Start difference. First operand 192 states and 283 transitions. Second operand 18 states. [2018-12-03 00:04:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:48,783 INFO L93 Difference]: Finished difference Result 403 states and 658 transitions. [2018-12-03 00:04:48,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-03 00:04:48,783 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 191 [2018-12-03 00:04:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:48,785 INFO L225 Difference]: With dead ends: 403 [2018-12-03 00:04:48,786 INFO L226 Difference]: Without dead ends: 258 [2018-12-03 00:04:48,787 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 363 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2018-12-03 00:04:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-03 00:04:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 239. [2018-12-03 00:04:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-12-03 00:04:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 345 transitions. [2018-12-03 00:04:48,809 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 345 transitions. Word has length 191 [2018-12-03 00:04:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:48,809 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 345 transitions. [2018-12-03 00:04:48,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-03 00:04:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 345 transitions. [2018-12-03 00:04:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-12-03 00:04:48,812 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:48,812 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:48,813 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:48,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:48,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1540387724, now seen corresponding path program 7 times [2018-12-03 00:04:48,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:48,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:48,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 00:04:48,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:48,814 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 221 proven. 78 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-12-03 00:04:48,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:48,892 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:48,892 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:48,892 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:48,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:48,892 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/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 [2018-12-03 00:04:48,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:48,898 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 00:04:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:48,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 221 proven. 78 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-12-03 00:04:48,957 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 223 proven. 84 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-12-03 00:04:49,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:49,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 15 [2018-12-03 00:04:49,415 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:49,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-03 00:04:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-03 00:04:49,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-12-03 00:04:49,416 INFO L87 Difference]: Start difference. First operand 239 states and 345 transitions. Second operand 10 states. [2018-12-03 00:04:49,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:49,527 INFO L93 Difference]: Finished difference Result 313 states and 461 transitions. [2018-12-03 00:04:49,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-03 00:04:49,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 191 [2018-12-03 00:04:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:49,529 INFO L225 Difference]: With dead ends: 313 [2018-12-03 00:04:49,529 INFO L226 Difference]: Without dead ends: 306 [2018-12-03 00:04:49,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 370 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2018-12-03 00:04:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-12-03 00:04:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 257. [2018-12-03 00:04:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-12-03 00:04:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 384 transitions. [2018-12-03 00:04:49,542 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 384 transitions. Word has length 191 [2018-12-03 00:04:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:49,542 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 384 transitions. [2018-12-03 00:04:49,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-03 00:04:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 384 transitions. [2018-12-03 00:04:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-12-03 00:04:49,544 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:49,544 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:49,544 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:49,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1321278712, now seen corresponding path program 8 times [2018-12-03 00:04:49,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:49,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:49,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:49,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:49,545 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 251 proven. 113 refuted. 0 times theorem prover too weak. 865 trivial. 0 not checked. [2018-12-03 00:04:49,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:49,633 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:49,633 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:49,633 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:49,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:49,633 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/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 [2018-12-03 00:04:49,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-03 00:04:49,639 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-03 00:04:49,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-03 00:04:49,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 00:04:49,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 489 proven. 4 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2018-12-03 00:04:49,700 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 257 proven. 32 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2018-12-03 00:04:50,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:50,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2018-12-03 00:04:50,001 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:50,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-03 00:04:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-03 00:04:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2018-12-03 00:04:50,002 INFO L87 Difference]: Start difference. First operand 257 states and 384 transitions. Second operand 17 states. [2018-12-03 00:04:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:50,244 INFO L93 Difference]: Finished difference Result 503 states and 792 transitions. [2018-12-03 00:04:50,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-03 00:04:50,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 217 [2018-12-03 00:04:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:50,246 INFO L225 Difference]: With dead ends: 503 [2018-12-03 00:04:50,246 INFO L226 Difference]: Without dead ends: 280 [2018-12-03 00:04:50,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 426 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2018-12-03 00:04:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-12-03 00:04:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 224. [2018-12-03 00:04:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-12-03 00:04:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 307 transitions. [2018-12-03 00:04:50,257 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 307 transitions. Word has length 217 [2018-12-03 00:04:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:50,258 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 307 transitions. [2018-12-03 00:04:50,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-03 00:04:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 307 transitions. [2018-12-03 00:04:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-03 00:04:50,259 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:50,259 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:50,259 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:50,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:50,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1006786053, now seen corresponding path program 9 times [2018-12-03 00:04:50,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:50,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:50,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 00:04:50,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:50,260 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 90 proven. 118 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2018-12-03 00:04:50,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:50,294 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:50,294 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:50,294 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:50,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:50,294 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 00:04:50,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-03 00:04:50,303 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-03 00:04:50,320 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-03 00:04:50,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-03 00:04:50,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 88 proven. 182 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2018-12-03 00:04:50,379 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 796 backedges. 92 proven. 186 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2018-12-03 00:04:50,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:50,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 13] total 18 [2018-12-03 00:04:50,817 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:50,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-03 00:04:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-03 00:04:50,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2018-12-03 00:04:50,818 INFO L87 Difference]: Start difference. First operand 224 states and 307 transitions. Second operand 13 states. [2018-12-03 00:04:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:51,032 INFO L93 Difference]: Finished difference Result 526 states and 809 transitions. [2018-12-03 00:04:51,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-03 00:04:51,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 178 [2018-12-03 00:04:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:51,033 INFO L225 Difference]: With dead ends: 526 [2018-12-03 00:04:51,034 INFO L226 Difference]: Without dead ends: 180 [2018-12-03 00:04:51,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 335 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2018-12-03 00:04:51,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-12-03 00:04:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 174. [2018-12-03 00:04:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-12-03 00:04:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 228 transitions. [2018-12-03 00:04:51,042 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 228 transitions. Word has length 178 [2018-12-03 00:04:51,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:51,042 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 228 transitions. [2018-12-03 00:04:51,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-03 00:04:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 228 transitions. [2018-12-03 00:04:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-12-03 00:04:51,043 INFO L394 BasicCegarLoop]: Found error trace [2018-12-03 00:04:51,044 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 12, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-03 00:04:51,044 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-03 00:04:51,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-03 00:04:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1673740410, now seen corresponding path program 10 times [2018-12-03 00:04:51,044 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-03 00:04:51,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:51,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-03 00:04:51,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-03 00:04:51,044 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-03 00:04:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 103 proven. 320 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2018-12-03 00:04:51,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:51,148 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-03 00:04:51,148 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-03 00:04:51,148 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-03 00:04:51,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-03 00:04:51,149 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-03 00:04:51,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-03 00:04:51,155 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-03 00:04:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-03 00:04:51,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-03 00:04:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 107 proven. 314 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2018-12-03 00:04:51,213 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-03 00:04:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 105 proven. 330 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2018-12-03 00:04:51,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-03 00:04:51,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 16] total 22 [2018-12-03 00:04:51,993 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-03 00:04:51,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-03 00:04:51,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-03 00:04:51,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-12-03 00:04:51,994 INFO L87 Difference]: Start difference. First operand 174 states and 228 transitions. Second operand 15 states. [2018-12-03 00:04:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-03 00:04:52,120 INFO L93 Difference]: Finished difference Result 221 states and 289 transitions. [2018-12-03 00:04:52,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-03 00:04:52,120 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 217 [2018-12-03 00:04:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-03 00:04:52,121 INFO L225 Difference]: With dead ends: 221 [2018-12-03 00:04:52,121 INFO L226 Difference]: Without dead ends: 0 [2018-12-03 00:04:52,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 416 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2018-12-03 00:04:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-03 00:04:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-03 00:04:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-03 00:04:52,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-03 00:04:52,124 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 217 [2018-12-03 00:04:52,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-03 00:04:52,124 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-03 00:04:52,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-03 00:04:52,124 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-03 00:04:52,124 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-03 00:04:52,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-03 00:04:52,229 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,237 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,263 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,266 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,283 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,286 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,308 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,311 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,348 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,349 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,350 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,354 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,359 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,382 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,385 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,402 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,404 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,416 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,418 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,426 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,430 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,433 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,446 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,448 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,457 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,463 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,464 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,467 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,476 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,483 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,485 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,504 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,504 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,505 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,506 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,508 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,520 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,549 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,555 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,592 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,593 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,603 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,605 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,614 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,616 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,617 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,637 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,638 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,639 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,679 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,680 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,680 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,681 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,691 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,692 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,696 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,718 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,723 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,723 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,724 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,724 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,737 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,739 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,743 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,743 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,747 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,748 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,751 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,752 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,755 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,762 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,763 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,769 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,770 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,773 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,774 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,785 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,785 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,797 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,799 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,803 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,804 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,807 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,809 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,811 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,813 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,814 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,820 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,820 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,821 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,821 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,829 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,830 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,834 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,835 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,839 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,840 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,845 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,845 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,849 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,850 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,854 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,855 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,862 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,863 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,863 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,863 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,864 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,864 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,870 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,872 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,874 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,875 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,879 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,880 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,883 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,884 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,887 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,888 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,891 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,892 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,895 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,896 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,898 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,899 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,910 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,911 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,915 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,916 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,920 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,929 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,930 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,930 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,931 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,931 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,932 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,953 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,953 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,954 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,954 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,955 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,962 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,963 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,963 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,964 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,964 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,965 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,971 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,971 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,972 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,973 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,973 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,980 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,981 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,981 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,982 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,982 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,989 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,989 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,990 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,990 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:52,998 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,000 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,001 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,009 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,010 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,010 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,011 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,015 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,016 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,016 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,016 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,019 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,020 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,025 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,026 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,030 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,031 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,037 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,038 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,038 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,039 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,039 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,046 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,046 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,047 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,047 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,048 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,054 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,054 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,055 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,055 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,056 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,063 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,065 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,066 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,066 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,071 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,071 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,072 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,072 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,078 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,079 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,079 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,080 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,080 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,085 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,085 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,086 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,086 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,092 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,092 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,092 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,099 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,099 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,100 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,100 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,101 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,106 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,110 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,110 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,114 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,114 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,117 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,117 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,123 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,124 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,124 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,125 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,125 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,130 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,130 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,135 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,135 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,141 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,141 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,146 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,146 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,147 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,147 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,153 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,153 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,154 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,154 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,160 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,161 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,161 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,167 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,167 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,168 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,168 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,174 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,175 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,175 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,175 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,176 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,176 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-12-03 00:04:53,495 WARN L180 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 31 [2018-12-03 00:04:53,709 WARN L180 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 31 [2018-12-03 00:04:53,711 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-03 00:04:53,711 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-03 00:04:53,711 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-03 00:04:53,711 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2018-12-03 00:04:53,711 INFO L444 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2018-12-03 00:04:53,711 INFO L448 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L451 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2018-12-03 00:04:53,712 INFO L444 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (< 1 |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n)) [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L444 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (<= fibo2_~n |fibo2_#in~n|)) (.cse1 (<= |fibo2_#in~n| fibo2_~n))) (and (or (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (not (= |fibo2_#in~n| 5))) (< 1 |fibo2_#in~n|) (or (and (and .cse0 .cse1) (<= 5 |fibo2_#in~n|)) (<= |fibo2_#in~n| 3) (and .cse0 .cse1 (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|))) (or (and (<= 1 |fibo2_#t~ret2|) .cse0 (<= |fibo2_#t~ret2| 1) .cse1) (< 3 |fibo2_#in~n|)))) [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L451 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2018-12-03 00:04:53,712 INFO L444 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (< 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L444 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (or (not (= |fibo1_#in~n| 6)) (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|))) (or (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2)) (not (= |fibo1_#in~n| 4))) (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|)) (.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and .cse0 (<= 1 |fibo1_#t~ret0|) (<= 3 |fibo1_#in~n|) (<= |fibo1_#t~ret0| 1) .cse1) (and .cse0 (<= 4 |fibo1_#in~n|) .cse1)))) [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2018-12-03 00:04:53,712 INFO L448 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2018-12-03 00:04:53,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:04:53 BoogieIcfgContainer [2018-12-03 00:04:53,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-03 00:04:53,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-03 00:04:53,715 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-03 00:04:53,715 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-03 00:04:53,715 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:04:38" (3/4) ... [2018-12-03 00:04:53,717 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-03 00:04:53,721 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-03 00:04:53,721 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-03 00:04:53,721 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2018-12-03 00:04:53,721 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2018-12-03 00:04:53,723 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-03 00:04:53,723 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-12-03 00:04:53,724 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-03 00:04:53,748 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_33234ca0-c9ac-476a-8fd5-373d4fdcecb6/bin-2019/utaipan/witness.graphml [2018-12-03 00:04:53,748 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-03 00:04:53,749 INFO L168 Benchmark]: Toolchain (without parser) took 15280.42 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 726.1 MB). Free memory was 952.4 MB in the beginning and 1.3 GB in the end (delta: -305.0 MB). Peak memory consumption was 421.1 MB. Max. memory is 11.5 GB. [2018-12-03 00:04:53,749 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 00:04:53,749 INFO L168 Benchmark]: CACSL2BoogieTranslator took 131.31 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-03 00:04:53,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.36 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 00:04:53,750 INFO L168 Benchmark]: Boogie Preprocessor took 10.42 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-03 00:04:53,750 INFO L168 Benchmark]: RCFGBuilder took 149.63 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.9 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -139.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2018-12-03 00:04:53,750 INFO L168 Benchmark]: TraceAbstraction took 14938.10 ms. Allocated memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: 631.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -193.9 MB). Peak memory consumption was 788.2 MB. Max. memory is 11.5 GB. [2018-12-03 00:04:53,750 INFO L168 Benchmark]: Witness Printer took 33.88 ms. Allocated memory is still 1.8 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. [2018-12-03 00:04:53,752 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 131.31 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.36 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.42 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 149.63 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.9 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -139.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14938.10 ms. Allocated memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: 631.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -193.9 MB). Peak memory consumption was 788.2 MB. Max. memory is 11.5 GB. * Witness Printer took 33.88 ms. Allocated memory is still 1.8 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. SAFE Result, 14.8s OverallTime, 17 OverallIterations, 17 TraceHistogramMax, 3.5s AutomataDifference, 0.0s DeadEndRemovalTime, 1.5s HoareAnnotationTime, HoareTripleCheckerStatistics: 648 SDtfs, 645 SDslu, 5384 SDs, 0 SdLazy, 4087 SolverSat, 557 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 4084 GetRequests, 3605 SyntacticMatches, 125 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=257occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.5s AbstIntTime, 5 AbstIntIterations, 4 AbstIntStrong, 0.8596938775510204 AbsIntWeakeningRatio, 0.5714285714285714 AbsIntAvgWeakeningVarsNumRemoved, 0.20408163265306123 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 359 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 929 PreInvPairs, 2802 NumberOfFragments, 151 HoareAnnotationTreeSize, 929 FomulaSimplifications, 285038 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 7946 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 3837 NumberOfCodeBlocks, 3540 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 5603 ConstructedInterpolants, 0 QuantifiedInterpolants, 1715143 SizeOfPredicates, 54 NumberOfNonLiveVariables, 3293 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 39 InterpolantComputations, 2 PerfectInterpolantSequences, 21526/25267 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...