./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_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:23,198 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 22:15:23,199 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 22:15:23,205 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 22:15:23,205 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 22:15:23,206 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 22:15:23,207 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 22:15:23,207 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 22:15:23,208 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 22:15:23,209 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 22:15:23,209 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 22:15:23,210 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 22:15:23,210 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 22:15:23,211 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 22:15:23,211 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 22:15:23,212 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 22:15:23,212 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 22:15:23,213 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 22:15:23,214 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 22:15:23,215 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 22:15:23,215 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 22:15:23,216 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 22:15:23,217 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 22:15:23,217 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 22:15:23,217 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 22:15:23,218 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 22:15:23,218 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 22:15:23,218 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 22:15:23,219 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 22:15:23,219 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 22:15:23,220 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 22:15:23,220 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 22:15:23,220 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 22:15:23,220 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 22:15:23,221 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 22:15:23,221 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 22:15:23,221 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 22:15:23,229 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 22:15:23,229 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 22:15:23,229 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 22:15:23,229 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 22:15:23,229 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 22:15:23,230 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 22:15:23,230 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 22:15:23,230 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 22:15:23,230 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 22:15:23,230 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 22:15:23,230 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 22:15:23,230 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 22:15:23,230 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 22:15:23,230 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 22:15:23,231 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 22:15:23,231 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 22:15:23,232 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 22:15:23,232 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 22:15:23,232 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_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:23,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 22:15:23,259 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 22:15:23,262 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 22:15:23,263 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 22:15:23,263 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 22:15:23,263 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/../../sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-12-02 22:15:23,300 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/data/a05aeaa7e/5448b37fe5ca4505954d67f5e595ba29/FLAGcec746e89 [2018-12-02 22:15:23,684 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 22:15:23,684 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/sv-benchmarks/c/reducercommutativity/rangesum20_false-unreach-call.i [2018-12-02 22:15:23,688 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/data/a05aeaa7e/5448b37fe5ca4505954d67f5e595ba29/FLAGcec746e89 [2018-12-02 22:15:23,696 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/bin-2019/utaipan/data/a05aeaa7e/5448b37fe5ca4505954d67f5e595ba29 [2018-12-02 22:15:23,698 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 22:15:23,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 22:15:23,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 22:15:23,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 22:15:23,701 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 22:15:23,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe9828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23, skipping insertion in model container [2018-12-02 22:15:23,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 22:15:23,718 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 22:15:23,806 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 22:15:23,811 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 22:15:23,824 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 22:15:23,832 INFO L195 MainTranslator]: Completed translation [2018-12-02 22:15:23,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23 WrapperNode [2018-12-02 22:15:23,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 22:15:23,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 22:15:23,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 22:15:23,833 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 22:15:23,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 22:15:23,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 22:15:23,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 22:15:23,874 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 22:15:23,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... [2018-12-02 22:15:23,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 22:15:23,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 22:15:23,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 22:15:23,892 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 22:15:23,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 22:15:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 22:15:23,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 22:15:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 22:15:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 22:15:23,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 22:15:23,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-02 22:15:23,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 22:15:23,923 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 22:15:23,923 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2018-12-02 22:15:23,923 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2018-12-02 22:15:23,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 22:15:23,923 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2018-12-02 22:15:23,923 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2018-12-02 22:15:24,046 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 22:15:24,046 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-02 22:15:24,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:15:24 BoogieIcfgContainer [2018-12-02 22:15:24,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 22:15:24,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 22:15:24,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 22:15:24,049 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 22:15:24,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:15:23" (1/3) ... [2018-12-02 22:15:24,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2599830b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:15:24, skipping insertion in model container [2018-12-02 22:15:24,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:15:23" (2/3) ... [2018-12-02 22:15:24,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2599830b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:15:24, skipping insertion in model container [2018-12-02 22:15:24,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:15:24" (3/3) ... [2018-12-02 22:15:24,051 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum20_false-unreach-call.i [2018-12-02 22:15:24,057 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 22:15:24,061 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 22:15:24,070 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 22:15:24,088 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 22:15:24,088 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 22:15:24,088 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 22:15:24,088 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 22:15:24,088 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 22:15:24,088 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 22:15:24,088 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 22:15:24,088 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 22:15:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2018-12-02 22:15:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-02 22:15:24,103 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:24,104 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] [2018-12-02 22:15:24,105 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:24,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2018-12-02 22:15:24,110 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:24,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:24,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:24,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:24,137 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:24,182 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-02 22:15:24,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:24,182 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 22:15:24,183 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-12-02 22:15:24,184 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] [2018-12-02 22:15:24,205 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 22:15:24,206 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 22:15:24,273 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 22:15:24,274 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. [2018-12-02 22:15:24,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:24,282 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 22:15:24,315 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 88.89% of their original sizes. [2018-12-02 22:15:24,315 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 22:15:24,325 INFO L418 sIntCurrentIteration]: We unified 36 AI predicates to 36 [2018-12-02 22:15:24,325 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 22:15:24,326 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:15:24,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 22:15:24,326 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:15:24,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 22:15:24,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 22:15:24,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-02 22:15:24,333 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2018-12-02 22:15:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:24,441 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2018-12-02 22:15:24,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-02 22:15:24,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2018-12-02 22:15:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:24,447 INFO L225 Difference]: With dead ends: 66 [2018-12-02 22:15:24,447 INFO L226 Difference]: Without dead ends: 34 [2018-12-02 22:15:24,449 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 [2018-12-02 22:15:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-12-02 22:15:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-12-02 22:15:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-02 22:15:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2018-12-02 22:15:24,479 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2018-12-02 22:15:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:24,479 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2018-12-02 22:15:24,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 22:15:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2018-12-02 22:15:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-02 22:15:24,481 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:24,481 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] [2018-12-02 22:15:24,481 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:24,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2018-12-02 22:15:24,481 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:24,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:24,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:24,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:24,482 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:24,496 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:24,496 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:24,496 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:24,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:24,503 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:24,532 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 40 with the following transitions: [2018-12-02 22:15:24,532 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] [2018-12-02 22:15:24,534 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 22:15:24,534 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 22:15:24,562 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 22:15:24,562 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. [2018-12-02 22:15:24,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:24,564 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 22:15:24,582 INFO L227 lantSequenceWeakener]: Weakened 15 states. On average, predicates are now at 85.4% of their original sizes. [2018-12-02 22:15:24,582 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 22:15:24,613 INFO L418 sIntCurrentIteration]: We unified 38 AI predicates to 38 [2018-12-02 22:15:24,613 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 22:15:24,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:15:24,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-02 22:15:24,614 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:15:24,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 22:15:24,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 22:15:24,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 22:15:24,615 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 7 states. [2018-12-02 22:15:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:24,825 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2018-12-02 22:15:24,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 22:15:24,825 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2018-12-02 22:15:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:24,826 INFO L225 Difference]: With dead ends: 54 [2018-12-02 22:15:24,826 INFO L226 Difference]: Without dead ends: 36 [2018-12-02 22:15:24,827 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 [2018-12-02 22:15:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-02 22:15:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-12-02 22:15:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-02 22:15:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2018-12-02 22:15:24,830 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2018-12-02 22:15:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:24,831 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2018-12-02 22:15:24,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 22:15:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2018-12-02 22:15:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-02 22:15:24,831 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:24,831 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] [2018-12-02 22:15:24,832 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:24,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1719401286, now seen corresponding path program 1 times [2018-12-02 22:15:24,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:24,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:24,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:24,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:24,833 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:24,839 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:24,839 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:24,839 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:24,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:24,848 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:24,875 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-12-02 22:15:24,876 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] [2018-12-02 22:15:24,877 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 22:15:24,877 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 22:15:25,018 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 22:15:25,018 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. [2018-12-02 22:15:25,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:25,026 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 22:15:25,077 INFO L227 lantSequenceWeakener]: Weakened 19 states. On average, predicates are now at 84.74% of their original sizes. [2018-12-02 22:15:25,078 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 22:15:25,109 INFO L418 sIntCurrentIteration]: We unified 47 AI predicates to 47 [2018-12-02 22:15:25,110 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 22:15:25,110 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:15:25,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-02 22:15:25,110 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:15:25,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-02 22:15:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-02 22:15:25,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-12-02 22:15:25,111 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 7 states. [2018-12-02 22:15:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:25,258 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2018-12-02 22:15:25,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 22:15:25,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2018-12-02 22:15:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:25,261 INFO L225 Difference]: With dead ends: 61 [2018-12-02 22:15:25,261 INFO L226 Difference]: Without dead ends: 41 [2018-12-02 22:15:25,261 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 [2018-12-02 22:15:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-02 22:15:25,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-12-02 22:15:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-02 22:15:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2018-12-02 22:15:25,268 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 48 [2018-12-02 22:15:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:25,269 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2018-12-02 22:15:25,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-02 22:15:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2018-12-02 22:15:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-12-02 22:15:25,270 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:25,270 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] [2018-12-02 22:15:25,270 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:25,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:25,270 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2018-12-02 22:15:25,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:25,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:25,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:25,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:25,272 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-02 22:15:25,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:25,314 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 22:15:25,315 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 49 with the following transitions: [2018-12-02 22:15:25,315 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] [2018-12-02 22:15:25,316 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 22:15:25,316 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 22:15:25,341 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 22:15:25,341 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. [2018-12-02 22:15:25,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:25,342 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 22:15:25,361 INFO L227 lantSequenceWeakener]: Weakened 33 states. On average, predicates are now at 83.4% of their original sizes. [2018-12-02 22:15:25,361 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 22:15:25,452 INFO L418 sIntCurrentIteration]: We unified 47 AI predicates to 47 [2018-12-02 22:15:25,452 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 22:15:25,453 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 22:15:25,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [4] total 14 [2018-12-02 22:15:25,453 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:15:25,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 22:15:25,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 22:15:25,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-12-02 22:15:25,454 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 12 states. [2018-12-02 22:15:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:25,882 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2018-12-02 22:15:25,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 22:15:25,882 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-12-02 22:15:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:25,883 INFO L225 Difference]: With dead ends: 74 [2018-12-02 22:15:25,883 INFO L226 Difference]: Without dead ends: 55 [2018-12-02 22:15:25,883 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 [2018-12-02 22:15:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-02 22:15:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2018-12-02 22:15:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-02 22:15:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2018-12-02 22:15:25,888 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 48 [2018-12-02 22:15:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:25,888 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2018-12-02 22:15:25,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 22:15:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2018-12-02 22:15:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-12-02 22:15:25,889 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:25,889 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] [2018-12-02 22:15:25,889 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:25,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 125205893, now seen corresponding path program 1 times [2018-12-02 22:15:25,889 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:25,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:25,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:25,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:25,890 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-12-02 22:15:25,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:25,912 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 22:15:25,912 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 51 with the following transitions: [2018-12-02 22:15:25,912 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] [2018-12-02 22:15:25,913 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 22:15:25,914 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 22:15:25,952 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 22:15:25,952 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. [2018-12-02 22:15:25,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:25,955 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 22:15:25,987 INFO L227 lantSequenceWeakener]: Weakened 47 states. On average, predicates are now at 81.06% of their original sizes. [2018-12-02 22:15:25,988 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 22:15:26,056 INFO L418 sIntCurrentIteration]: We unified 49 AI predicates to 49 [2018-12-02 22:15:26,056 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 22:15:26,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-02 22:15:26,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [4] total 16 [2018-12-02 22:15:26,057 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:15:26,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-02 22:15:26,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-02 22:15:26,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-12-02 22:15:26,058 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 14 states. [2018-12-02 22:15:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:26,453 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2018-12-02 22:15:26,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-02 22:15:26,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-12-02 22:15:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:26,455 INFO L225 Difference]: With dead ends: 66 [2018-12-02 22:15:26,455 INFO L226 Difference]: Without dead ends: 62 [2018-12-02 22:15:26,455 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2018-12-02 22:15:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-02 22:15:26,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2018-12-02 22:15:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-12-02 22:15:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2018-12-02 22:15:26,463 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 50 [2018-12-02 22:15:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:26,463 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2018-12-02 22:15:26,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-02 22:15:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2018-12-02 22:15:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-02 22:15:26,464 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:26,465 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] [2018-12-02 22:15:26,465 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:26,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash 395797120, now seen corresponding path program 1 times [2018-12-02 22:15:26,465 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:26,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:26,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:26,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:26,466 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:26,485 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-02 22:15:26,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:26,485 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 22:15:26,486 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 52 with the following transitions: [2018-12-02 22:15:26,486 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] [2018-12-02 22:15:26,487 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 22:15:26,487 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 22:15:26,641 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-02 22:15:26,641 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. [2018-12-02 22:15:26,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:26,646 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-02 22:15:26,671 INFO L227 lantSequenceWeakener]: Weakened 36 states. On average, predicates are now at 86.31% of their original sizes. [2018-12-02 22:15:26,672 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-02 22:15:26,730 INFO L418 sIntCurrentIteration]: We unified 50 AI predicates to 50 [2018-12-02 22:15:26,731 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-02 22:15:26,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 22:15:26,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-02 22:15:26,731 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 22:15:26,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 22:15:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 22:15:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-02 22:15:26,732 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 8 states. [2018-12-02 22:15:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:26,838 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2018-12-02 22:15:26,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 22:15:26,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2018-12-02 22:15:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:26,839 INFO L225 Difference]: With dead ends: 73 [2018-12-02 22:15:26,839 INFO L226 Difference]: Without dead ends: 52 [2018-12-02 22:15:26,839 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 [2018-12-02 22:15:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-12-02 22:15:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2018-12-02 22:15:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-02 22:15:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2018-12-02 22:15:26,845 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 51 [2018-12-02 22:15:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:26,846 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2018-12-02 22:15:26,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 22:15:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2018-12-02 22:15:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-02 22:15:26,846 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:26,847 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] [2018-12-02 22:15:26,847 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:26,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:26,847 INFO L82 PathProgramCache]: Analyzing trace with hash -515269076, now seen corresponding path program 1 times [2018-12-02 22:15:26,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:26,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:26,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:26,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:26,848 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:26,859 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-02 22:15:26,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:26,860 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 22:15:26,860 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 54 with the following transitions: [2018-12-02 22:15:26,860 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] [2018-12-02 22:15:26,861 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 22:15:26,861 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 22:15:27,102 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 22:15:27,103 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. [2018-12-02 22:15:27,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:27,104 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 22:15:27,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:27,104 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:27,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:27,110 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 22:15:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:27,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-02 22:15:27,154 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2018-12-02 22:15:27,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:27,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-12-02 22:15:27,236 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:27,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 22:15:27,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 22:15:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:15:27,238 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 6 states. [2018-12-02 22:15:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:27,256 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2018-12-02 22:15:27,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 22:15:27,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2018-12-02 22:15:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:27,257 INFO L225 Difference]: With dead ends: 95 [2018-12-02 22:15:27,257 INFO L226 Difference]: Without dead ends: 56 [2018-12-02 22:15:27,258 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 [2018-12-02 22:15:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-02 22:15:27,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-02 22:15:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-02 22:15:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2018-12-02 22:15:27,265 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 53 [2018-12-02 22:15:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:27,265 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2018-12-02 22:15:27,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 22:15:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2018-12-02 22:15:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-12-02 22:15:27,266 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:27,266 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] [2018-12-02 22:15:27,266 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:27,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash -871058906, now seen corresponding path program 2 times [2018-12-02 22:15:27,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:27,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:27,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:27,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:27,268 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:27,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-12-02 22:15:27,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:27,291 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 22:15:27,291 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 22:15:27,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 22:15:27,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:27,291 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:27,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 22:15:27,298 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 22:15:27,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 22:15:27,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:15:27,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-12-02 22:15:27,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-12-02 22:15:27,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:27,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-12-02 22:15:27,390 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:27,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-02 22:15:27,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-02 22:15:27,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-02 22:15:27,391 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 8 states. [2018-12-02 22:15:27,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:27,413 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2018-12-02 22:15:27,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-02 22:15:27,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2018-12-02 22:15:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:27,414 INFO L225 Difference]: With dead ends: 104 [2018-12-02 22:15:27,414 INFO L226 Difference]: Without dead ends: 69 [2018-12-02 22:15:27,415 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 [2018-12-02 22:15:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-02 22:15:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2018-12-02 22:15:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-12-02 22:15:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2018-12-02 22:15:27,423 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 59 [2018-12-02 22:15:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:27,424 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2018-12-02 22:15:27,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-02 22:15:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2018-12-02 22:15:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-12-02 22:15:27,425 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:27,425 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] [2018-12-02 22:15:27,426 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:27,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:27,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1442887404, now seen corresponding path program 1 times [2018-12-02 22:15:27,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:27,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:27,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:27,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:27,427 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:27,437 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:27,437 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:27,438 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:27,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:27,444 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:27,471 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 102 with the following transitions: [2018-12-02 22:15:27,471 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] [2018-12-02 22:15:27,472 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-02 22:15:27,472 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-02 22:15:27,580 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-02 22:15:27,580 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. [2018-12-02 22:15:27,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:27,586 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-02 22:15:27,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:27,587 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:27,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:27,595 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 22:15:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:27,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2018-12-02 22:15:27,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2018-12-02 22:15:27,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:27,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-12-02 22:15:27,720 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:27,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 22:15:27,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 22:15:27,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 22:15:27,721 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 12 states. [2018-12-02 22:15:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:27,745 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2018-12-02 22:15:27,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 22:15:27,746 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2018-12-02 22:15:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:27,747 INFO L225 Difference]: With dead ends: 127 [2018-12-02 22:15:27,747 INFO L226 Difference]: Without dead ends: 78 [2018-12-02 22:15:27,747 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 [2018-12-02 22:15:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-12-02 22:15:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-12-02 22:15:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-12-02 22:15:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2018-12-02 22:15:27,755 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 101 [2018-12-02 22:15:27,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:27,755 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2018-12-02 22:15:27,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 22:15:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2018-12-02 22:15:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-02 22:15:27,756 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:27,756 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] [2018-12-02 22:15:27,756 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:27,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:27,756 INFO L82 PathProgramCache]: Analyzing trace with hash -992722080, now seen corresponding path program 2 times [2018-12-02 22:15:27,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:27,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:27,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:27,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:27,757 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:27,768 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:27,768 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:27,768 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:27,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:27,775 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:27,803 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 22:15:27,803 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 22:15:27,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:27,803 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:27,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 22:15:27,809 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 22:15:27,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-02 22:15:27,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:15:27,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 250 proven. 1 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-12-02 22:15:27,853 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-12-02 22:15:27,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:27,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-12-02 22:15:27,914 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:27,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 22:15:27,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 22:15:27,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:15:27,915 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 6 states. [2018-12-02 22:15:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:27,928 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2018-12-02 22:15:27,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 22:15:27,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-12-02 22:15:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:27,929 INFO L225 Difference]: With dead ends: 123 [2018-12-02 22:15:27,929 INFO L226 Difference]: Without dead ends: 90 [2018-12-02 22:15:27,929 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 [2018-12-02 22:15:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-12-02 22:15:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-12-02 22:15:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-12-02 22:15:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2018-12-02 22:15:27,936 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 113 [2018-12-02 22:15:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:27,936 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2018-12-02 22:15:27,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 22:15:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2018-12-02 22:15:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-12-02 22:15:27,937 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:27,937 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] [2018-12-02 22:15:27,937 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:27,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash -748407238, now seen corresponding path program 3 times [2018-12-02 22:15:27,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:27,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:27,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:27,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:27,938 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:27,946 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:27,946 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:27,946 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:27,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:27,955 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:27,985 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 22:15:27,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 22:15:27,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:27,985 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:27,992 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 22:15:27,992 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 22:15:28,013 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 22:15:28,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:15:28,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2018-12-02 22:15:28,034 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 23 proven. 250 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2018-12-02 22:15:28,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:28,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-12-02 22:15:28,091 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:28,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 22:15:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 22:15:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-02 22:15:28,091 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 6 states. [2018-12-02 22:15:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:28,116 INFO L93 Difference]: Finished difference Result 156 states and 197 transitions. [2018-12-02 22:15:28,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 22:15:28,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-12-02 22:15:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:28,117 INFO L225 Difference]: With dead ends: 156 [2018-12-02 22:15:28,117 INFO L226 Difference]: Without dead ends: 99 [2018-12-02 22:15:28,117 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 [2018-12-02 22:15:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-02 22:15:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-12-02 22:15:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-02 22:15:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2018-12-02 22:15:28,123 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 119 [2018-12-02 22:15:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:28,124 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2018-12-02 22:15:28,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 22:15:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2018-12-02 22:15:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-12-02 22:15:28,125 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:28,125 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] [2018-12-02 22:15:28,125 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:28,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:28,125 INFO L82 PathProgramCache]: Analyzing trace with hash -788952678, now seen corresponding path program 4 times [2018-12-02 22:15:28,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:28,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:28,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:28,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:28,126 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:28,139 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:28,139 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:28,139 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:28,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:28,147 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:28,178 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 22:15:28,178 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 22:15:28,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:28,178 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:28,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:28,184 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 22:15:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:28,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2018-12-02 22:15:28,284 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2018-12-02 22:15:28,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:28,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2018-12-02 22:15:28,402 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:28,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-02 22:15:28,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-02 22:15:28,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-12-02 22:15:28,403 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand 22 states. [2018-12-02 22:15:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:28,437 INFO L93 Difference]: Finished difference Result 189 states and 230 transitions. [2018-12-02 22:15:28,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-02 22:15:28,438 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 146 [2018-12-02 22:15:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:28,438 INFO L225 Difference]: With dead ends: 189 [2018-12-02 22:15:28,438 INFO L226 Difference]: Without dead ends: 119 [2018-12-02 22:15:28,439 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 [2018-12-02 22:15:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-02 22:15:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-12-02 22:15:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-02 22:15:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2018-12-02 22:15:28,444 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 146 [2018-12-02 22:15:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:28,445 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2018-12-02 22:15:28,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-02 22:15:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2018-12-02 22:15:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-12-02 22:15:28,445 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:28,445 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] [2018-12-02 22:15:28,446 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:28,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:28,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1590673490, now seen corresponding path program 5 times [2018-12-02 22:15:28,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:28,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:28,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:28,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:28,446 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:28,456 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:28,456 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:28,456 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:28,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:28,462 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:28,496 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 22:15:28,496 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 22:15:28,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:28,496 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:28,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 22:15:28,502 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 22:15:28,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-02 22:15:28,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:15:28,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 532 proven. 16 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2018-12-02 22:15:28,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1549 trivial. 0 not checked. [2018-12-02 22:15:28,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:28,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-12-02 22:15:28,646 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:28,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 22:15:28,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 22:15:28,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 22:15:28,647 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 12 states. [2018-12-02 22:15:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:28,669 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2018-12-02 22:15:28,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 22:15:28,670 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2018-12-02 22:15:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:28,671 INFO L225 Difference]: With dead ends: 185 [2018-12-02 22:15:28,671 INFO L226 Difference]: Without dead ends: 143 [2018-12-02 22:15:28,671 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 [2018-12-02 22:15:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-12-02 22:15:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-12-02 22:15:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-12-02 22:15:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2018-12-02 22:15:28,678 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 166 [2018-12-02 22:15:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:28,678 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2018-12-02 22:15:28,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 22:15:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2018-12-02 22:15:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-12-02 22:15:28,679 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:28,679 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] [2018-12-02 22:15:28,679 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:28,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1538927878, now seen corresponding path program 6 times [2018-12-02 22:15:28,679 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:28,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:28,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:28,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:28,680 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:28,693 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:28,694 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:28,694 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:28,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:28,702 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:28,748 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 22:15:28,748 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 22:15:28,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:28,749 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:28,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 22:15:28,755 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 22:15:28,779 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 22:15:28,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:15:28,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 329 proven. 26 refuted. 0 times theorem prover too weak. 1294 trivial. 0 not checked. [2018-12-02 22:15:28,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 65 proven. 556 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2018-12-02 22:15:28,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:28,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-12-02 22:15:28,870 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:28,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 22:15:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 22:15:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 22:15:28,871 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 12 states. [2018-12-02 22:15:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:28,898 INFO L93 Difference]: Finished difference Result 251 states and 295 transitions. [2018-12-02 22:15:28,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 22:15:28,899 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 178 [2018-12-02 22:15:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:28,899 INFO L225 Difference]: With dead ends: 251 [2018-12-02 22:15:28,899 INFO L226 Difference]: Without dead ends: 161 [2018-12-02 22:15:28,900 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 [2018-12-02 22:15:28,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-12-02 22:15:28,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-12-02 22:15:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-12-02 22:15:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 177 transitions. [2018-12-02 22:15:28,906 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 177 transitions. Word has length 178 [2018-12-02 22:15:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:28,906 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 177 transitions. [2018-12-02 22:15:28,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 22:15:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 177 transitions. [2018-12-02 22:15:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-12-02 22:15:28,907 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:28,907 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] [2018-12-02 22:15:28,907 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:28,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:28,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1667140602, now seen corresponding path program 7 times [2018-12-02 22:15:28,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:28,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:28,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:28,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:28,908 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:28,916 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:28,916 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:28,917 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:28,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:28,923 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:28,961 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 22:15:28,961 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 22:15:28,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:28,961 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:28,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:28,966 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-02 22:15:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:29,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 1133 proven. 155 refuted. 0 times theorem prover too weak. 2332 trivial. 0 not checked. [2018-12-02 22:15:29,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3620 backedges. 149 proven. 1573 refuted. 0 times theorem prover too weak. 1898 trivial. 0 not checked. [2018-12-02 22:15:29,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:29,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-02 22:15:29,151 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:29,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-02 22:15:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-02 22:15:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-12-02 22:15:29,151 INFO L87 Difference]: Start difference. First operand 161 states and 177 transitions. Second operand 13 states. [2018-12-02 22:15:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:29,178 INFO L93 Difference]: Finished difference Result 272 states and 311 transitions. [2018-12-02 22:15:29,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-02 22:15:29,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 232 [2018-12-02 22:15:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:29,180 INFO L225 Difference]: With dead ends: 272 [2018-12-02 22:15:29,180 INFO L226 Difference]: Without dead ends: 164 [2018-12-02 22:15:29,180 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 [2018-12-02 22:15:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-12-02 22:15:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-12-02 22:15:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-02 22:15:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 180 transitions. [2018-12-02 22:15:29,187 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 180 transitions. Word has length 232 [2018-12-02 22:15:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:29,187 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 180 transitions. [2018-12-02 22:15:29,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-02 22:15:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 180 transitions. [2018-12-02 22:15:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-12-02 22:15:29,188 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:29,189 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] [2018-12-02 22:15:29,189 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:29,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1163837658, now seen corresponding path program 8 times [2018-12-02 22:15:29,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:29,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:29,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:29,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:29,190 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:29,198 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:29,198 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:29,198 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:29,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:29,207 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:29,247 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 22:15:29,247 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 22:15:29,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:29,247 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:29,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 22:15:29,253 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-02 22:15:29,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-02 22:15:29,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:15:29,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 743 proven. 40 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2018-12-02 22:15:29,464 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 743 proven. 40 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2018-12-02 22:15:29,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:29,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-12-02 22:15:29,554 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:29,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-02 22:15:29,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-02 22:15:29,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-12-02 22:15:29,555 INFO L87 Difference]: Start difference. First operand 164 states and 180 transitions. Second operand 12 states. [2018-12-02 22:15:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:29,589 INFO L93 Difference]: Finished difference Result 287 states and 333 transitions. [2018-12-02 22:15:29,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-02 22:15:29,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 241 [2018-12-02 22:15:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:29,591 INFO L225 Difference]: With dead ends: 287 [2018-12-02 22:15:29,591 INFO L226 Difference]: Without dead ends: 176 [2018-12-02 22:15:29,591 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 [2018-12-02 22:15:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-12-02 22:15:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-12-02 22:15:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-12-02 22:15:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 196 transitions. [2018-12-02 22:15:29,598 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 196 transitions. Word has length 241 [2018-12-02 22:15:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:29,599 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 196 transitions. [2018-12-02 22:15:29,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-02 22:15:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 196 transitions. [2018-12-02 22:15:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-12-02 22:15:29,600 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:29,600 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] [2018-12-02 22:15:29,600 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:29,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:29,601 INFO L82 PathProgramCache]: Analyzing trace with hash -360124326, now seen corresponding path program 9 times [2018-12-02 22:15:29,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:29,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:29,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:29,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:29,601 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:29,610 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:29,610 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:29,610 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:29,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:29,617 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 22:15:29,664 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-02 22:15:29,664 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-02 22:15:29,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 22:15:29,664 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:29,673 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 22:15:29,673 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-02 22:15:29,729 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 22:15:29,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 22:15:29,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 22:15:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 2490 proven. 100 refuted. 0 times theorem prover too weak. 3415 trivial. 0 not checked. [2018-12-02 22:15:29,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 22:15:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6005 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2018-12-02 22:15:29,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-02 22:15:29,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2018-12-02 22:15:29,930 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-02 22:15:29,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-02 22:15:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-02 22:15:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-12-02 22:15:29,930 INFO L87 Difference]: Start difference. First operand 176 states and 196 transitions. Second operand 21 states. [2018-12-02 22:15:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 22:15:29,969 INFO L93 Difference]: Finished difference Result 287 states and 336 transitions. [2018-12-02 22:15:29,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-02 22:15:29,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 277 [2018-12-02 22:15:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 22:15:29,970 INFO L225 Difference]: With dead ends: 287 [2018-12-02 22:15:29,970 INFO L226 Difference]: Without dead ends: 212 [2018-12-02 22:15:29,970 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 [2018-12-02 22:15:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-12-02 22:15:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2018-12-02 22:15:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-12-02 22:15:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 232 transitions. [2018-12-02 22:15:29,978 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 232 transitions. Word has length 277 [2018-12-02 22:15:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 22:15:29,978 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 232 transitions. [2018-12-02 22:15:29,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-02 22:15:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 232 transitions. [2018-12-02 22:15:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-12-02 22:15:29,979 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 22:15:29,979 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] [2018-12-02 22:15:29,979 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 22:15:29,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 22:15:29,979 INFO L82 PathProgramCache]: Analyzing trace with hash -657380760, now seen corresponding path program 10 times [2018-12-02 22:15:29,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 22:15:29,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:29,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 22:15:29,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 22:15:29,980 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 22:15:29,988 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-12-02 22:15:29,988 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-12-02 22:15:29,988 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ce46957-ad79-4af5-a02a-682a9cfbfe54/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 [2018-12-02 22:15:29,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 22:15:29,994 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-12-02 22:15:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-12-02 22:15:32,041 INFO L285 seRefinementStrategy]: Strategy TaipanRefinementStrategy was unsuccessful and could not determine trace feasibility. [2018-12-02 22:15:32,041 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 22:15:32,066 WARN L228 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-12-02 22:15:32,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 10:15:32 BoogieIcfgContainer [2018-12-02 22:15:32,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 22:15:32,067 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 22:15:32,067 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 22:15:32,067 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 22:15:32,067 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:15:24" (3/4) ... [2018-12-02 22:15:32,070 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 22:15:32,070 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 22:15:32,071 INFO L168 Benchmark]: Toolchain (without parser) took 8372.73 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 288.4 MB). Free memory was 961.4 MB in the beginning and 851.2 MB in the end (delta: 110.2 MB). Peak memory consumption was 398.6 MB. Max. memory is 11.5 GB. [2018-12-02 22:15:32,072 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:15:32,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 133.31 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 949.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-02 22:15:32,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -158.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2018-12-02 22:15:32,073 INFO L168 Benchmark]: Boogie Preprocessor took 16.95 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:15:32,073 INFO L168 Benchmark]: RCFGBuilder took 155.58 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-12-02 22:15:32,074 INFO L168 Benchmark]: TraceAbstraction took 8018.98 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 175.6 MB). Free memory was 1.1 GB in the beginning and 851.2 MB in the end (delta: 237.3 MB). Peak memory consumption was 412.9 MB. Max. memory is 11.5 GB. [2018-12-02 22:15:32,074 INFO L168 Benchmark]: Witness Printer took 3.68 ms. Allocated memory is still 1.3 GB. Free memory is still 851.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 22:15:32,076 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 133.31 ms. Allocated memory is still 1.0 GB. Free memory was 961.4 MB in the beginning and 949.6 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 41.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -158.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.95 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 155.58 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8018.98 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 175.6 MB). Free memory was 1.1 GB in the beginning and 851.2 MB in the end (delta: 237.3 MB). Peak memory consumption was 412.9 MB. Max. memory is 11.5 GB. * Witness Printer took 3.68 ms. Allocated memory is still 1.3 GB. Free memory is still 851.2 MB. 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, 0.6s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 3646 GetRequests, 3463 SyntacticMatches, 19 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s 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, 0.8s 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, 1.2s 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...