./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i --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_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/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 d02e722fa6530375aea2bbc43a68e422ad66c6f3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 04:01:53,700 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 04:01:53,701 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 04:01:53,707 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 04:01:53,707 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 04:01:53,708 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 04:01:53,708 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 04:01:53,709 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 04:01:53,710 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 04:01:53,710 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 04:01:53,711 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 04:01:53,711 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 04:01:53,712 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 04:01:53,712 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 04:01:53,713 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 04:01:53,713 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 04:01:53,714 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 04:01:53,714 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 04:01:53,715 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 04:01:53,716 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 04:01:53,717 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 04:01:53,717 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 04:01:53,719 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 04:01:53,719 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 04:01:53,719 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 04:01:53,719 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 04:01:53,720 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 04:01:53,720 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 04:01:53,721 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 04:01:53,721 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 04:01:53,722 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 04:01:53,722 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 04:01:53,722 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 04:01:53,722 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 04:01:53,723 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 04:01:53,723 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 04:01:53,723 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 04:01:53,731 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 04:01:53,731 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 04:01:53,731 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 04:01:53,731 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 04:01:53,732 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 04:01:53,732 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 04:01:53,732 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 04:01:53,732 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 04:01:53,732 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 04:01:53,732 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 04:01:53,732 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 04:01:53,732 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 04:01:53,732 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 04:01:53,733 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 04:01:53,733 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 04:01:53,734 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 04:01:53,734 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 04:01:53,734 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 04:01:53,734 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 04:01:53,734 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 04:01:53,734 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 04:01:53,734 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 04:01:53,734 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 04:01:53,734 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 04:01:53,734 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 04:01:53,735 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 04:01:53,735 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 04:01:53,735 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_255e217f-0b2d-4d61-8ab3-968fb17c3619/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 -> d02e722fa6530375aea2bbc43a68e422ad66c6f3 [2018-12-09 04:01:53,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 04:01:53,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 04:01:53,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 04:01:53,761 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 04:01:53,761 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 04:01:53,762 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-12-09 04:01:53,797 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/data/a89a788be/22d41b99e8c64174955c8ca73898a328/FLAG945e0d7ec [2018-12-09 04:01:54,243 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 04:01:54,243 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-12-09 04:01:54,247 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/data/a89a788be/22d41b99e8c64174955c8ca73898a328/FLAG945e0d7ec [2018-12-09 04:01:54,254 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/data/a89a788be/22d41b99e8c64174955c8ca73898a328 [2018-12-09 04:01:54,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 04:01:54,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 04:01:54,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 04:01:54,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 04:01:54,259 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 04:01:54,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c2778c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54, skipping insertion in model container [2018-12-09 04:01:54,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 04:01:54,275 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 04:01:54,361 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 04:01:54,366 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 04:01:54,379 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 04:01:54,387 INFO L195 MainTranslator]: Completed translation [2018-12-09 04:01:54,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54 WrapperNode [2018-12-09 04:01:54,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 04:01:54,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 04:01:54,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 04:01:54,388 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 04:01:54,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 04:01:54,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 04:01:54,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 04:01:54,402 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 04:01:54,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... [2018-12-09 04:01:54,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 04:01:54,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 04:01:54,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 04:01:54,447 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 04:01:54,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 04:01:54,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 04:01:54,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 04:01:54,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 04:01:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 04:01:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 04:01:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 04:01:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 04:01:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 04:01:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 04:01:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2018-12-09 04:01:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2018-12-09 04:01:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 04:01:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2018-12-09 04:01:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2018-12-09 04:01:54,609 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 04:01:54,609 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-09 04:01:54,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:01:54 BoogieIcfgContainer [2018-12-09 04:01:54,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 04:01:54,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 04:01:54,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 04:01:54,612 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 04:01:54,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:01:54" (1/3) ... [2018-12-09 04:01:54,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebb62cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:01:54, skipping insertion in model container [2018-12-09 04:01:54,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:01:54" (2/3) ... [2018-12-09 04:01:54,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebb62cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:01:54, skipping insertion in model container [2018-12-09 04:01:54,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:01:54" (3/3) ... [2018-12-09 04:01:54,614 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum20_false-unreach-call.i [2018-12-09 04:01:54,620 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 04:01:54,625 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 04:01:54,634 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 04:01:54,653 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 04:01:54,653 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 04:01:54,653 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 04:01:54,653 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 04:01:54,653 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 04:01:54,654 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 04:01:54,654 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 04:01:54,654 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 04:01:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-12-09 04:01:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-09 04:01:54,670 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:54,671 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-12-09 04:01:54,672 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:54,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2018-12-09 04:01:54,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:54,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:54,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:54,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:54,705 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:54,751 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-09 04:01:54,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:54,751 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:01:54,751 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-12-09 04:01:54,752 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [17], [25], [27], [30], [31], [38], [55], [59], [61], [62], [68], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88] [2018-12-09 04:01:54,775 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:01:54,775 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:01:54,843 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 04:01:54,844 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 57 root evaluator evaluations with a maximum evaluation depth of 3. Performed 57 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 23 variables. [2018-12-09 04:01:54,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:54,849 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 04:01:54,880 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 88.89% of their original sizes. [2018-12-09 04:01:54,881 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 04:01:54,892 INFO L418 sIntCurrentIteration]: We unified 36 AI predicates to 36 [2018-12-09 04:01:54,892 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 04:01:54,893 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 04:01:54,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 04:01:54,893 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 04:01:54,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 04:01:54,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 04:01:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 04:01:54,900 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2018-12-09 04:01:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:55,002 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2018-12-09 04:01:55,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 04:01:55,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2018-12-09 04:01:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:55,008 INFO L225 Difference]: With dead ends: 66 [2018-12-09 04:01:55,008 INFO L226 Difference]: Without dead ends: 34 [2018-12-09 04:01:55,010 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 04:01:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-09 04:01:55,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-09 04:01:55,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-09 04:01:55,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2018-12-09 04:01:55,033 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2018-12-09 04:01:55,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:55,034 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2018-12-09 04:01:55,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 04:01:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2018-12-09 04:01:55,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-09 04:01:55,035 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:55,035 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2018-12-09 04:01:55,035 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:55,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:55,035 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2018-12-09 04:01:55,035 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:55,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:55,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:55,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:55,036 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:55,045 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:55,045 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:55,045 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:55,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:55,052 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:55,076 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-12-09 04:01:55,076 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [17], [25], [27], [30], [31], [38], [44], [59], [61], [62], [68], [70], [72], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88] [2018-12-09 04:01:55,077 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:01:55,078 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:01:55,106 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 04:01:55,106 INFO L272 AbstractInterpreter]: Visited 17 different actions 26 times. Merged at 2 different actions 6 times. Never widened. Performed 151 root evaluator evaluations with a maximum evaluation depth of 3. Performed 151 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 23 variables. [2018-12-09 04:01:55,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:55,109 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 04:01:55,127 INFO L227 lantSequenceWeakener]: Weakened 15 states. On average, predicates are now at 85.4% of their original sizes. [2018-12-09 04:01:55,127 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 04:01:55,154 INFO L418 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-12-09 04:01:55,154 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 04:01:55,154 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 04:01:55,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 04:01:55,155 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 04:01:55,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 04:01:55,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 04:01:55,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 04:01:55,156 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 7 states. [2018-12-09 04:01:55,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:55,365 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2018-12-09 04:01:55,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 04:01:55,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-12-09 04:01:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:55,366 INFO L225 Difference]: With dead ends: 54 [2018-12-09 04:01:55,366 INFO L226 Difference]: Without dead ends: 36 [2018-12-09 04:01:55,366 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-09 04:01:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-09 04:01:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-12-09 04:01:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-09 04:01:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2018-12-09 04:01:55,370 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2018-12-09 04:01:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:55,370 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2018-12-09 04:01:55,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 04:01:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2018-12-09 04:01:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-09 04:01:55,371 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:55,371 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2018-12-09 04:01:55,372 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:55,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:55,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1719401286, now seen corresponding path program 1 times [2018-12-09 04:01:55,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:55,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:55,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:55,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:55,373 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:55,380 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:55,381 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:55,381 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:55,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:55,389 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:55,412 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-12-09 04:01:55,412 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [17], [25], [27], [30], [31], [38], [44], [46], [51], [53], [59], [61], [62], [68], [70], [72], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88] [2018-12-09 04:01:55,414 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:01:55,414 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:01:55,573 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 04:01:55,573 INFO L272 AbstractInterpreter]: Visited 21 different actions 47 times. Merged at 6 different actions 19 times. Widened at 1 different actions 1 times. Performed 219 root evaluator evaluations with a maximum evaluation depth of 10. Performed 219 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 4 fixpoints after 4 different actions. Largest state had 23 variables. [2018-12-09 04:01:55,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:55,575 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 04:01:55,627 INFO L227 lantSequenceWeakener]: Weakened 19 states. On average, predicates are now at 84.74% of their original sizes. [2018-12-09 04:01:55,627 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 04:01:55,649 INFO L418 sIntCurrentIteration]: We unified 47 AI predicates to 47 [2018-12-09 04:01:55,649 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 04:01:55,649 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 04:01:55,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-09 04:01:55,649 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 04:01:55,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 04:01:55,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 04:01:55,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-09 04:01:55,650 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 7 states. [2018-12-09 04:01:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:55,805 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2018-12-09 04:01:55,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 04:01:55,806 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2018-12-09 04:01:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:55,808 INFO L225 Difference]: With dead ends: 61 [2018-12-09 04:01:55,808 INFO L226 Difference]: Without dead ends: 41 [2018-12-09 04:01:55,809 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-12-09 04:01:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-09 04:01:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-12-09 04:01:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 04:01:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-12-09 04:01:55,816 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 48 [2018-12-09 04:01:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:55,816 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-12-09 04:01:55,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 04:01:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-12-09 04:01:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-09 04:01:55,817 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:55,818 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2018-12-09 04:01:55,818 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:55,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:55,818 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2018-12-09 04:01:55,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:55,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:55,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:55,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:55,819 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-09 04:01:55,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:55,875 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:01:55,875 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-12-09 04:01:55,875 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [17], [25], [27], [30], [31], [38], [44], [46], [51], [53], [60], [61], [62], [68], [70], [72], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88] [2018-12-09 04:01:55,876 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:01:55,877 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:01:55,915 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 04:01:55,915 INFO L272 AbstractInterpreter]: Visited 28 different actions 68 times. Merged at 5 different actions 24 times. Never widened. Performed 295 root evaluator evaluations with a maximum evaluation depth of 3. Performed 295 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 6 fixpoints after 4 different actions. Largest state had 23 variables. [2018-12-09 04:01:55,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:55,917 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 04:01:55,943 INFO L227 lantSequenceWeakener]: Weakened 33 states. On average, predicates are now at 83.4% of their original sizes. [2018-12-09 04:01:55,943 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 04:01:56,019 INFO L418 sIntCurrentIteration]: We unified 47 AI predicates to 47 [2018-12-09 04:01:56,019 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 04:01:56,019 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-09 04:01:56,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [4] total 14 [2018-12-09 04:01:56,019 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 04:01:56,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 04:01:56,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 04:01:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:01:56,020 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 12 states. [2018-12-09 04:01:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:56,416 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2018-12-09 04:01:56,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 04:01:56,416 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-12-09 04:01:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:56,417 INFO L225 Difference]: With dead ends: 74 [2018-12-09 04:01:56,417 INFO L226 Difference]: Without dead ends: 55 [2018-12-09 04:01:56,417 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-12-09 04:01:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-09 04:01:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2018-12-09 04:01:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-09 04:01:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2018-12-09 04:01:56,422 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 48 [2018-12-09 04:01:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:56,422 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2018-12-09 04:01:56,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 04:01:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2018-12-09 04:01:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-09 04:01:56,423 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:56,423 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2018-12-09 04:01:56,423 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:56,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:56,423 INFO L82 PathProgramCache]: Analyzing trace with hash 125205893, now seen corresponding path program 1 times [2018-12-09 04:01:56,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:56,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:56,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:56,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:56,424 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-09 04:01:56,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:56,447 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:01:56,447 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-12-09 04:01:56,447 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [17], [19], [21], [25], [27], [30], [31], [38], [44], [46], [51], [53], [60], [61], [62], [68], [70], [72], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88] [2018-12-09 04:01:56,448 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:01:56,448 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:01:56,481 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 04:01:56,481 INFO L272 AbstractInterpreter]: Visited 35 different actions 91 times. Merged at 7 different actions 30 times. Never widened. Performed 386 root evaluator evaluations with a maximum evaluation depth of 3. Performed 386 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 7 fixpoints after 5 different actions. Largest state had 25 variables. [2018-12-09 04:01:56,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:56,483 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 04:01:56,504 INFO L227 lantSequenceWeakener]: Weakened 47 states. On average, predicates are now at 81.06% of their original sizes. [2018-12-09 04:01:56,504 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 04:01:56,587 INFO L418 sIntCurrentIteration]: We unified 49 AI predicates to 49 [2018-12-09 04:01:56,587 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 04:01:56,587 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-09 04:01:56,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [4] total 16 [2018-12-09 04:01:56,587 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 04:01:56,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-09 04:01:56,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-09 04:01:56,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-12-09 04:01:56,588 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 14 states. [2018-12-09 04:01:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:56,985 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2018-12-09 04:01:56,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-09 04:01:56,986 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-12-09 04:01:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:56,986 INFO L225 Difference]: With dead ends: 66 [2018-12-09 04:01:56,986 INFO L226 Difference]: Without dead ends: 62 [2018-12-09 04:01:56,987 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2018-12-09 04:01:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-09 04:01:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2018-12-09 04:01:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-09 04:01:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2018-12-09 04:01:56,992 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 50 [2018-12-09 04:01:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:56,992 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2018-12-09 04:01:56,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-09 04:01:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2018-12-09 04:01:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-09 04:01:56,993 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:56,993 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1] [2018-12-09 04:01:56,993 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:56,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:56,993 INFO L82 PathProgramCache]: Analyzing trace with hash 395797120, now seen corresponding path program 1 times [2018-12-09 04:01:56,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:56,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:56,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:56,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:56,994 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:57,006 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-09 04:01:57,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:57,007 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:01:57,007 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 52 with the following transitions: [2018-12-09 04:01:57,007 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [17], [25], [27], [30], [31], [38], [44], [46], [49], [51], [53], [59], [60], [61], [62], [68], [70], [72], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88] [2018-12-09 04:01:57,008 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:01:57,008 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:01:57,175 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 04:01:57,175 INFO L272 AbstractInterpreter]: Visited 30 different actions 145 times. Merged at 14 different actions 67 times. Widened at 1 different actions 2 times. Performed 701 root evaluator evaluations with a maximum evaluation depth of 10. Performed 701 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 19 fixpoints after 7 different actions. Largest state had 23 variables. [2018-12-09 04:01:57,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:57,177 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 04:01:57,202 INFO L227 lantSequenceWeakener]: Weakened 36 states. On average, predicates are now at 86.31% of their original sizes. [2018-12-09 04:01:57,202 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 04:01:57,227 INFO L418 sIntCurrentIteration]: We unified 50 AI predicates to 50 [2018-12-09 04:01:57,227 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 04:01:57,228 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 04:01:57,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-09 04:01:57,228 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 04:01:57,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 04:01:57,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 04:01:57,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-09 04:01:57,228 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 8 states. [2018-12-09 04:01:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:57,336 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2018-12-09 04:01:57,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 04:01:57,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2018-12-09 04:01:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:57,337 INFO L225 Difference]: With dead ends: 73 [2018-12-09 04:01:57,337 INFO L226 Difference]: Without dead ends: 52 [2018-12-09 04:01:57,337 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-12-09 04:01:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-09 04:01:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2018-12-09 04:01:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-09 04:01:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2018-12-09 04:01:57,344 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 51 [2018-12-09 04:01:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:57,344 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2018-12-09 04:01:57,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 04:01:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2018-12-09 04:01:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-09 04:01:57,346 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:57,346 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2018-12-09 04:01:57,346 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:57,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:57,346 INFO L82 PathProgramCache]: Analyzing trace with hash -515269076, now seen corresponding path program 1 times [2018-12-09 04:01:57,346 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:57,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:57,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:57,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:57,347 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:57,363 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-09 04:01:57,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:57,363 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:01:57,363 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 54 with the following transitions: [2018-12-09 04:01:57,363 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [17], [19], [21], [25], [27], [30], [31], [38], [44], [46], [49], [51], [53], [59], [60], [61], [62], [68], [70], [72], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88] [2018-12-09 04:01:57,364 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:01:57,364 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:01:57,608 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 04:01:57,608 INFO L272 AbstractInterpreter]: Visited 38 different actions 251 times. Merged at 22 different actions 125 times. Widened at 2 different actions 5 times. Performed 1169 root evaluator evaluations with a maximum evaluation depth of 10. Performed 1169 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 36 fixpoints after 11 different actions. Largest state had 25 variables. [2018-12-09 04:01:57,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:57,610 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 04:01:57,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:57,610 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:01:57,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:57,619 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 04:01:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:57,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 04:01:57,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:01:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-09 04:01:57,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:01:57,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-12-09 04:01:57,713 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:01:57,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 04:01:57,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 04:01:57,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 04:01:57,716 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 6 states. [2018-12-09 04:01:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:57,733 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2018-12-09 04:01:57,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 04:01:57,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2018-12-09 04:01:57,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:57,734 INFO L225 Difference]: With dead ends: 95 [2018-12-09 04:01:57,734 INFO L226 Difference]: Without dead ends: 56 [2018-12-09 04:01:57,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 04:01:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-09 04:01:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-09 04:01:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-09 04:01:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2018-12-09 04:01:57,742 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 53 [2018-12-09 04:01:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:57,742 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2018-12-09 04:01:57,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 04:01:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2018-12-09 04:01:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-09 04:01:57,743 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:57,744 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1] [2018-12-09 04:01:57,744 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:57,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash -871058906, now seen corresponding path program 2 times [2018-12-09 04:01:57,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:57,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:57,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:57,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:57,745 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:57,767 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-09 04:01:57,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:57,767 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 04:01:57,767 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:01:57,767 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:01:57,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:57,767 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:01:57,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 04:01:57,774 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 04:01:57,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 04:01:57,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:01:57,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-12-09 04:01:57,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:01:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-12-09 04:01:57,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:01:57,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-12-09 04:01:57,867 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:01:57,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-09 04:01:57,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 04:01:57,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 04:01:57,868 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 8 states. [2018-12-09 04:01:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:57,891 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2018-12-09 04:01:57,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 04:01:57,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2018-12-09 04:01:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:57,893 INFO L225 Difference]: With dead ends: 104 [2018-12-09 04:01:57,893 INFO L226 Difference]: Without dead ends: 69 [2018-12-09 04:01:57,893 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-09 04:01:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-09 04:01:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-12-09 04:01:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-09 04:01:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2018-12-09 04:01:57,900 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 59 [2018-12-09 04:01:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:57,900 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2018-12-09 04:01:57,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-09 04:01:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2018-12-09 04:01:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-09 04:01:57,902 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:57,902 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 15, 4, 4, 3, 3, 3, 3, 3, 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] [2018-12-09 04:01:57,903 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:57,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:57,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1442887404, now seen corresponding path program 1 times [2018-12-09 04:01:57,903 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:57,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:57,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:57,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:57,904 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:57,912 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:57,912 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:57,912 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:57,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:57,918 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:57,950 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 102 with the following transitions: [2018-12-09 04:01:57,950 INFO L205 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [17], [19], [21], [25], [27], [30], [31], [38], [44], [46], [49], [51], [53], [59], [61], [62], [68], [70], [72], [76], [77], [78], [79], [81], [82], [83], [84], [85], [86], [87], [88] [2018-12-09 04:01:57,951 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 04:01:57,951 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 04:01:58,092 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 04:01:58,092 INFO L272 AbstractInterpreter]: Visited 37 different actions 114 times. Merged at 9 different actions 38 times. Never widened. Performed 524 root evaluator evaluations with a maximum evaluation depth of 10. Performed 524 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 12 fixpoints after 6 different actions. Largest state had 25 variables. [2018-12-09 04:01:58,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:58,094 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 04:01:58,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:58,094 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:01:58,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:58,100 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 04:01:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:58,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2018-12-09 04:01:58,145 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:01:58,193 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2018-12-09 04:01:58,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:01:58,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-12-09 04:01:58,208 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:01:58,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 04:01:58,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 04:01:58,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:01:58,209 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 12 states. [2018-12-09 04:01:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:58,236 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2018-12-09 04:01:58,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 04:01:58,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2018-12-09 04:01:58,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:58,237 INFO L225 Difference]: With dead ends: 127 [2018-12-09 04:01:58,237 INFO L226 Difference]: Without dead ends: 78 [2018-12-09 04:01:58,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:01:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-09 04:01:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-12-09 04:01:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-09 04:01:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2018-12-09 04:01:58,245 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 101 [2018-12-09 04:01:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:58,245 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2018-12-09 04:01:58,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 04:01:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2018-12-09 04:01:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-09 04:01:58,246 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:58,246 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 15, 10, 10, 3, 3, 3, 3, 3, 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] [2018-12-09 04:01:58,246 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:58,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:58,246 INFO L82 PathProgramCache]: Analyzing trace with hash -992722080, now seen corresponding path program 2 times [2018-12-09 04:01:58,246 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:58,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:58,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:58,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:58,247 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:58,256 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:58,256 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:58,256 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:58,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:58,264 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:58,291 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:01:58,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:01:58,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:58,291 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/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 [2018-12-09 04:01:58,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 04:01:58,297 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 04:01:58,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 04:01:58,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:01:58,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 250 proven. 1 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-12-09 04:01:58,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:01:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-12-09 04:01:58,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:01:58,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-12-09 04:01:58,384 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:01:58,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 04:01:58,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 04:01:58,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 04:01:58,385 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 6 states. [2018-12-09 04:01:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:58,399 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2018-12-09 04:01:58,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 04:01:58,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-12-09 04:01:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:58,400 INFO L225 Difference]: With dead ends: 123 [2018-12-09 04:01:58,400 INFO L226 Difference]: Without dead ends: 90 [2018-12-09 04:01:58,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 04:01:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-09 04:01:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-12-09 04:01:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-12-09 04:01:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2018-12-09 04:01:58,410 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 113 [2018-12-09 04:01:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:58,410 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2018-12-09 04:01:58,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 04:01:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2018-12-09 04:01:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-12-09 04:01:58,411 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:58,411 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 15, 10, 10, 4, 4, 3, 3, 3, 3, 3, 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] [2018-12-09 04:01:58,411 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:58,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash -748407238, now seen corresponding path program 3 times [2018-12-09 04:01:58,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:58,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:58,413 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:58,422 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:58,422 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:58,423 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:58,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:58,432 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:58,460 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:01:58,460 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:01:58,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:58,460 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/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 [2018-12-09 04:01:58,466 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 04:01:58,466 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 04:01:58,486 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 04:01:58,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:01:58,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2018-12-09 04:01:58,503 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:01:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 23 proven. 250 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2018-12-09 04:01:58,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:01:58,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-12-09 04:01:58,545 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:01:58,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 04:01:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 04:01:58,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 04:01:58,546 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 6 states. [2018-12-09 04:01:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:58,563 INFO L93 Difference]: Finished difference Result 156 states and 197 transitions. [2018-12-09 04:01:58,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 04:01:58,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-12-09 04:01:58,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:58,564 INFO L225 Difference]: With dead ends: 156 [2018-12-09 04:01:58,564 INFO L226 Difference]: Without dead ends: 99 [2018-12-09 04:01:58,565 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 04:01:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-09 04:01:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-12-09 04:01:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-09 04:01:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2018-12-09 04:01:58,574 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 119 [2018-12-09 04:01:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:58,574 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2018-12-09 04:01:58,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 04:01:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2018-12-09 04:01:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-12-09 04:01:58,575 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:58,576 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 10, 10, 4, 4, 3, 3, 3, 3, 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] [2018-12-09 04:01:58,576 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:58,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:58,576 INFO L82 PathProgramCache]: Analyzing trace with hash -788952678, now seen corresponding path program 4 times [2018-12-09 04:01:58,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:58,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:58,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:58,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:58,577 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:58,587 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:58,587 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:58,587 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:58,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:58,596 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:58,632 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:01:58,632 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:01:58,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:58,632 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:01:58,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:58,639 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 04:01:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:58,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2018-12-09 04:01:58,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:01:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2018-12-09 04:01:58,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:01:58,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-12-09 04:01:58,862 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:01:58,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-09 04:01:58,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-09 04:01:58,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-09 04:01:58,863 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand 22 states. [2018-12-09 04:01:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:58,900 INFO L93 Difference]: Finished difference Result 189 states and 230 transitions. [2018-12-09 04:01:58,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-09 04:01:58,900 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 146 [2018-12-09 04:01:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:58,901 INFO L225 Difference]: With dead ends: 189 [2018-12-09 04:01:58,901 INFO L226 Difference]: Without dead ends: 119 [2018-12-09 04:01:58,901 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 269 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-09 04:01:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-09 04:01:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-12-09 04:01:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-09 04:01:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2018-12-09 04:01:58,910 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 146 [2018-12-09 04:01:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:58,910 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2018-12-09 04:01:58,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-09 04:01:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2018-12-09 04:01:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-12-09 04:01:58,912 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:58,912 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 20, 20, 15, 12, 4, 4, 3, 3, 3, 3, 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] [2018-12-09 04:01:58,912 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:58,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1590673490, now seen corresponding path program 5 times [2018-12-09 04:01:58,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:58,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:58,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:58,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:58,913 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:58,926 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:58,926 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:58,926 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:58,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:58,935 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:58,968 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:01:58,968 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:01:58,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:58,968 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:01:58,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 04:01:58,974 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 04:01:59,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-09 04:01:59,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:01:59,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 532 proven. 16 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2018-12-09 04:01:59,052 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:01:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1549 trivial. 0 not checked. [2018-12-09 04:01:59,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:01:59,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-12-09 04:01:59,102 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:01:59,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 04:01:59,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 04:01:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:01:59,102 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 12 states. [2018-12-09 04:01:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:59,127 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2018-12-09 04:01:59,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 04:01:59,127 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2018-12-09 04:01:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:59,128 INFO L225 Difference]: With dead ends: 185 [2018-12-09 04:01:59,128 INFO L226 Difference]: Without dead ends: 143 [2018-12-09 04:01:59,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:01:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-09 04:01:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-12-09 04:01:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-12-09 04:01:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2018-12-09 04:01:59,137 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 166 [2018-12-09 04:01:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:59,138 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2018-12-09 04:01:59,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 04:01:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2018-12-09 04:01:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-09 04:01:59,139 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:59,139 INFO L402 BasicCegarLoop]: trace histogram [27, 27, 20, 20, 15, 12, 10, 10, 3, 3, 3, 3, 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] [2018-12-09 04:01:59,139 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:59,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:59,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1538927878, now seen corresponding path program 6 times [2018-12-09 04:01:59,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:59,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:59,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:59,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:59,140 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:59,152 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:59,152 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:59,152 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:59,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:59,158 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:59,192 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:01:59,192 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:01:59,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:59,193 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:01:59,199 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 04:01:59,199 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 04:01:59,223 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 04:01:59,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:01:59,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 329 proven. 26 refuted. 0 times theorem prover too weak. 1294 trivial. 0 not checked. [2018-12-09 04:01:59,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:01:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 65 proven. 556 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2018-12-09 04:01:59,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:01:59,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-12-09 04:01:59,313 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:01:59,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 04:01:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 04:01:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:01:59,314 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 12 states. [2018-12-09 04:01:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:59,343 INFO L93 Difference]: Finished difference Result 251 states and 295 transitions. [2018-12-09 04:01:59,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 04:01:59,344 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 178 [2018-12-09 04:01:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:59,344 INFO L225 Difference]: With dead ends: 251 [2018-12-09 04:01:59,344 INFO L226 Difference]: Without dead ends: 161 [2018-12-09 04:01:59,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:01:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-12-09 04:01:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-12-09 04:01:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-12-09 04:01:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2018-12-09 04:01:59,351 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 178 [2018-12-09 04:01:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:59,351 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2018-12-09 04:01:59,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 04:01:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2018-12-09 04:01:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-12-09 04:01:59,352 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:59,352 INFO L402 BasicCegarLoop]: trace histogram [45, 45, 30, 20, 20, 15, 10, 10, 3, 3, 3, 3, 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] [2018-12-09 04:01:59,352 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:59,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:59,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1667140602, now seen corresponding path program 7 times [2018-12-09 04:01:59,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:59,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:59,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:59,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:59,353 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:59,361 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:59,361 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:59,361 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:59,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:59,368 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:59,405 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:01:59,405 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:01:59,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:59,405 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:01:59,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:59,413 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 04:01:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:59,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 1133 proven. 155 refuted. 0 times theorem prover too weak. 2332 trivial. 0 not checked. [2018-12-09 04:01:59,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:01:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 149 proven. 1573 refuted. 0 times theorem prover too weak. 1898 trivial. 0 not checked. [2018-12-09 04:01:59,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:01:59,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-09 04:01:59,645 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:01:59,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 04:01:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 04:01:59,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 04:01:59,645 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand 13 states. [2018-12-09 04:01:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:01:59,684 INFO L93 Difference]: Finished difference Result 272 states and 311 transitions. [2018-12-09 04:01:59,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-09 04:01:59,685 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 232 [2018-12-09 04:01:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:01:59,686 INFO L225 Difference]: With dead ends: 272 [2018-12-09 04:01:59,686 INFO L226 Difference]: Without dead ends: 164 [2018-12-09 04:01:59,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 442 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-09 04:01:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-12-09 04:01:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-12-09 04:01:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-09 04:01:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 180 transitions. [2018-12-09 04:01:59,694 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 180 transitions. Word has length 232 [2018-12-09 04:01:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:01:59,694 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 180 transitions. [2018-12-09 04:01:59,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 04:01:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 180 transitions. [2018-12-09 04:01:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-12-09 04:01:59,695 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:01:59,695 INFO L402 BasicCegarLoop]: trace histogram [48, 48, 33, 20, 20, 15, 10, 10, 3, 3, 3, 3, 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] [2018-12-09 04:01:59,695 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:01:59,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:01:59,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1163837658, now seen corresponding path program 8 times [2018-12-09 04:01:59,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:01:59,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:59,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:01:59,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:01:59,696 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:01:59,704 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:01:59,704 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:01:59,704 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:01:59,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:01:59,713 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:01:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:01:59,752 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:01:59,753 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:01:59,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:01:59,753 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:01:59,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 04:01:59,759 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 04:01:59,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-09 04:01:59,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:01:59,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:01:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 743 proven. 40 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2018-12-09 04:01:59,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:02:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 743 proven. 40 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2018-12-09 04:02:00,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:02:00,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-12-09 04:02:00,033 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:02:00,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-09 04:02:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 04:02:00,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:02:00,033 INFO L87 Difference]: Start difference. First operand 164 states and 180 transitions. Second operand 12 states. [2018-12-09 04:02:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:02:00,067 INFO L93 Difference]: Finished difference Result 287 states and 333 transitions. [2018-12-09 04:02:00,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 04:02:00,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 241 [2018-12-09 04:02:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:02:00,068 INFO L225 Difference]: With dead ends: 287 [2018-12-09 04:02:00,068 INFO L226 Difference]: Without dead ends: 176 [2018-12-09 04:02:00,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 467 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-09 04:02:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-12-09 04:02:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-12-09 04:02:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-12-09 04:02:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 196 transitions. [2018-12-09 04:02:00,075 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 196 transitions. Word has length 241 [2018-12-09 04:02:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:02:00,075 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 196 transitions. [2018-12-09 04:02:00,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-09 04:02:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 196 transitions. [2018-12-09 04:02:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-12-09 04:02:00,076 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:02:00,076 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 33, 27, 20, 20, 10, 10, 3, 3, 3, 3, 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] [2018-12-09 04:02:00,076 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:02:00,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:02:00,076 INFO L82 PathProgramCache]: Analyzing trace with hash -360124326, now seen corresponding path program 9 times [2018-12-09 04:02:00,077 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:02:00,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:02:00,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:02:00,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:02:00,077 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:02:00,085 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:02:00,085 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:02:00,085 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:02:00,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:02:00,091 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:02:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 04:02:00,136 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 04:02:00,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 04:02:00,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 04:02:00,137 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 04:02:00,143 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 04:02:00,143 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-09 04:02:00,202 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 04:02:00,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 04:02:00,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 04:02:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 2490 proven. 100 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2018-12-09 04:02:00,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 04:02:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2018-12-09 04:02:00,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 04:02:00,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-12-09 04:02:00,397 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 04:02:00,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-09 04:02:00,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-09 04:02:00,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-09 04:02:00,398 INFO L87 Difference]: Start difference. First operand 176 states and 196 transitions. Second operand 21 states. [2018-12-09 04:02:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 04:02:00,435 INFO L93 Difference]: Finished difference Result 287 states and 336 transitions. [2018-12-09 04:02:00,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-09 04:02:00,435 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 277 [2018-12-09 04:02:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 04:02:00,436 INFO L225 Difference]: With dead ends: 287 [2018-12-09 04:02:00,436 INFO L226 Difference]: Without dead ends: 212 [2018-12-09 04:02:00,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 531 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-09 04:02:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-12-09 04:02:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-12-09 04:02:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-12-09 04:02:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 232 transitions. [2018-12-09 04:02:00,448 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 232 transitions. Word has length 277 [2018-12-09 04:02:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 04:02:00,448 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 232 transitions. [2018-12-09 04:02:00,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-09 04:02:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 232 transitions. [2018-12-09 04:02:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-12-09 04:02:00,449 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 04:02:00,449 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 33, 27, 20, 20, 19, 19, 3, 3, 3, 3, 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] [2018-12-09 04:02:00,449 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 04:02:00,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 04:02:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash -657380760, now seen corresponding path program 10 times [2018-12-09 04:02:00,449 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 04:02:00,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:02:00,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 04:02:00,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 04:02:00,450 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 04:02:00,459 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-09 04:02:00,459 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-09 04:02:00,459 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_255e217f-0b2d-4d61-8ab3-968fb17c3619/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-12-09 04:02:00,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 04:02:00,474 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-09 04:02:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-12-09 04:02:02,519 INFO L285 seRefinementStrategy]: Strategy TaipanRefinementStrategy was unsuccessful and could not determine trace feasibility. [2018-12-09 04:02:02,519 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 04:02:02,553 WARN L228 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-12-09 04:02:02,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:02:02 BoogieIcfgContainer [2018-12-09 04:02:02,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 04:02:02,554 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 04:02:02,554 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 04:02:02,554 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 04:02:02,554 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:01:54" (3/4) ... [2018-12-09 04:02:02,557 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 04:02:02,557 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 04:02:02,558 INFO L168 Benchmark]: Toolchain (without parser) took 8301.24 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 507.5 MB). Free memory was 957.8 MB in the beginning and 1.5 GB in the end (delta: -514.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 04:02:02,559 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 04:02:02,559 INFO L168 Benchmark]: CACSL2BoogieTranslator took 130.11 ms. Allocated memory is still 1.0 GB. Free memory was 957.8 MB in the beginning and 945.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-09 04:02:02,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.52 ms. Allocated memory is still 1.0 GB. Free memory was 945.9 MB in the beginning and 940.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 04:02:02,560 INFO L168 Benchmark]: Boogie Preprocessor took 45.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -195.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2018-12-09 04:02:02,560 INFO L168 Benchmark]: RCFGBuilder took 162.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2018-12-09 04:02:02,560 INFO L168 Benchmark]: TraceAbstraction took 7943.33 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 366.5 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -357.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 11.5 GB. [2018-12-09 04:02:02,561 INFO L168 Benchmark]: Witness Printer took 3.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 04:02:02,562 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 130.11 ms. Allocated memory is still 1.0 GB. Free memory was 957.8 MB in the beginning and 945.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.52 ms. Allocated memory is still 1.0 GB. Free memory was 945.9 MB in the beginning and 940.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 45.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -195.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 162.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7943.33 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 366.5 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -357.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 11.5 GB. * Witness Printer took 3.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 50]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L31] int x[20]; [L32] CALL init_nondet(x) [L5] int i; [L6] i = 0 [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 20 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND FALSE !(i < 20) [L32] RET init_nondet(x) [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; [L38] CALL, EXPR rangesum(x) [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 20) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L38] RET, EXPR rangesum(x) [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp [L41] CALL, EXPR rangesum(x) [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 20) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L41] RET, EXPR rangesum(x) [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<20 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND FALSE !(i<20 -1) [L46] x[20 -1] = temp [L47] CALL, EXPR rangesum(x) [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND FALSE !(i > 20/2) [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 20 [L18] COND TRUE i > 20/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 20) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L47] RET, EXPR rangesum(x) [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 [L50] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. UNKNOWN Result, 7.9s OverallTime, 18 OverallIterations, 60 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 553 SDtfs, 373 SDslu, 1609 SDs, 0 SdLazy, 321 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 3646 GetRequests, 3463 SyntacticMatches, 19 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.9s AbstIntTime, 8 AbstIntIterations, 6 AbstIntStrong, 0.8930923737103509 AbsIntWeakeningRatio, 1.1797752808988764 AbsIntAvgWeakeningVarsNumRemoved, 3.3895131086142323 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 32 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 3938 NumberOfCodeBlocks, 3524 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 3444 ConstructedInterpolants, 0 QuantifiedInterpolants, 729690 SizeOfPredicates, 14 NumberOfNonLiveVariables, 3416 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 24 InterpolantComputations, 0 PerfectInterpolantSequences, 37079/40217 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...