./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i -s /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/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 7be19e93bdd948471bb5345505ca5c828fc1d47b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i -s /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/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 7be19e93bdd948471bb5345505ca5c828fc1d47b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: var is still there: v_arrayElimCell_56 term size 19 --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 09:23:35,151 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:23:35,152 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:23:35,158 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:23:35,158 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:23:35,159 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:23:35,159 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:23:35,161 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:23:35,162 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:23:35,162 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:23:35,163 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:23:35,163 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:23:35,164 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:23:35,164 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:23:35,165 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:23:35,166 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:23:35,166 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:23:35,168 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:23:35,169 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:23:35,170 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:23:35,171 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:23:35,172 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:23:35,173 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:23:35,173 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:23:35,173 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:23:35,174 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:23:35,175 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:23:35,175 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:23:35,176 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:23:35,177 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:23:35,177 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:23:35,177 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:23:35,177 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:23:35,177 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:23:35,178 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:23:35,179 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:23:35,179 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 09:23:35,188 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:23:35,189 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:23:35,189 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 09:23:35,189 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 09:23:35,189 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 09:23:35,190 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 09:23:35,190 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 09:23:35,190 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 09:23:35,190 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 09:23:35,190 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 09:23:35,190 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 09:23:35,190 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 09:23:35,191 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 09:23:35,191 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:23:35,191 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 09:23:35,191 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 09:23:35,192 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 09:23:35,192 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:23:35,192 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 09:23:35,192 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:23:35,192 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 09:23:35,192 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 09:23:35,192 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 09:23:35,193 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:23:35,193 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 09:23:35,193 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:23:35,193 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:23:35,193 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:23:35,193 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:23:35,193 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:23:35,194 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:23:35,194 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:23:35,194 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 09:23:35,194 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 09:23:35,194 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:23:35,194 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 09:23:35,195 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 09:23:35,195 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_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/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 -> 7be19e93bdd948471bb5345505ca5c828fc1d47b [2018-11-18 09:23:35,218 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:23:35,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:23:35,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:23:35,230 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:23:35,230 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:23:35,231 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/../../sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i [2018-11-18 09:23:35,266 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data/7a8f7fa28/9ac68e615e3c43c18e6fdb4090b13ba1/FLAGe3cae2c64 [2018-11-18 09:23:35,721 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:23:35,722 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i [2018-11-18 09:23:35,731 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data/7a8f7fa28/9ac68e615e3c43c18e6fdb4090b13ba1/FLAGe3cae2c64 [2018-11-18 09:23:35,739 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data/7a8f7fa28/9ac68e615e3c43c18e6fdb4090b13ba1 [2018-11-18 09:23:35,741 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:23:35,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 09:23:35,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:23:35,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:23:35,745 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:23:35,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:23:35" (1/1) ... [2018-11-18 09:23:35,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab0bb1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:35, skipping insertion in model container [2018-11-18 09:23:35,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:23:35" (1/1) ... [2018-11-18 09:23:35,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:23:35,778 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:23:35,959 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:23:35,964 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:23:35,989 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:23:36,058 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:23:36,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36 WrapperNode [2018-11-18 09:23:36,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:23:36,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 09:23:36,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 09:23:36,059 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 09:23:36,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... [2018-11-18 09:23:36,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... [2018-11-18 09:23:36,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 09:23:36,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:23:36,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:23:36,079 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:23:36,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... [2018-11-18 09:23:36,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... [2018-11-18 09:23:36,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... [2018-11-18 09:23:36,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... [2018-11-18 09:23:36,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... [2018-11-18 09:23:36,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... [2018-11-18 09:23:36,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... [2018-11-18 09:23:36,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:23:36,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:23:36,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:23:36,102 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:23:36,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/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 [2018-11-18 09:23:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 09:23:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 09:23:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-18 09:23:36,135 INFO L138 BoogieDeclarations]: Found implementation of procedure exit [2018-11-18 09:23:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 09:23:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:23:36,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:23:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:23:36,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:23:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-18 09:23:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-18 09:23:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 09:23:36,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:23:36,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:23:36,322 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:23:36,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:23:36 BoogieIcfgContainer [2018-11-18 09:23:36,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:23:36,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:23:36,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:23:36,326 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:23:36,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:23:35" (1/3) ... [2018-11-18 09:23:36,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540c7d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:23:36, skipping insertion in model container [2018-11-18 09:23:36,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:36" (2/3) ... [2018-11-18 09:23:36,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540c7d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:23:36, skipping insertion in model container [2018-11-18 09:23:36,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:23:36" (3/3) ... [2018-11-18 09:23:36,328 INFO L112 eAbstractionObserver]: Analyzing ICFG list-ext_flag_false-unreach-call_false-valid-deref.i [2018-11-18 09:23:36,335 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:23:36,340 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 09:23:36,349 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 09:23:36,368 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:23:36,368 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 09:23:36,368 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:23:36,368 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:23:36,368 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:23:36,369 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:23:36,369 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:23:36,369 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:23:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-11-18 09:23:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 09:23:36,384 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:36,385 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:36,386 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:36,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1978135795, now seen corresponding path program 1 times [2018-11-18 09:23:36,393 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:36,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:36,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,427 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:36,479 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:23:36,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:23:36,479 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:23:36,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 09:23:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 09:23:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 09:23:36,491 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2018-11-18 09:23:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:36,505 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2018-11-18 09:23:36,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 09:23:36,506 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-11-18 09:23:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:36,513 INFO L225 Difference]: With dead ends: 60 [2018-11-18 09:23:36,514 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 09:23:36,516 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 09:23:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 09:23:36,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-18 09:23:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 09:23:36,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2018-11-18 09:23:36,538 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 14 [2018-11-18 09:23:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:36,538 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2018-11-18 09:23:36,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 09:23:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2018-11-18 09:23:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 09:23:36,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:36,539 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:36,539 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:36,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash -73602087, now seen corresponding path program 1 times [2018-11-18 09:23:36,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:36,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:36,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,541 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:36,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:23:36,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 09:23:36,641 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:23:36,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:23:36,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:23:36,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:23:36,644 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2018-11-18 09:23:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:36,739 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2018-11-18 09:23:36,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 09:23:36,739 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-18 09:23:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:36,740 INFO L225 Difference]: With dead ends: 66 [2018-11-18 09:23:36,740 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 09:23:36,741 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:23:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 09:23:36,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-11-18 09:23:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 09:23:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2018-11-18 09:23:36,744 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 19 [2018-11-18 09:23:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:36,745 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2018-11-18 09:23:36,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:23:36,745 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2018-11-18 09:23:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 09:23:36,745 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:36,745 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:36,746 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:36,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:36,746 INFO L82 PathProgramCache]: Analyzing trace with hash -73643813, now seen corresponding path program 1 times [2018-11-18 09:23:36,746 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:36,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:36,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,747 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:36,799 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:23:36,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 09:23:36,799 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:23:36,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 09:23:36,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 09:23:36,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:23:36,800 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 6 states. [2018-11-18 09:23:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:36,828 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-11-18 09:23:36,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 09:23:36,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 09:23:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:36,829 INFO L225 Difference]: With dead ends: 40 [2018-11-18 09:23:36,829 INFO L226 Difference]: Without dead ends: 32 [2018-11-18 09:23:36,829 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:23:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-18 09:23:36,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-11-18 09:23:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 09:23:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2018-11-18 09:23:36,831 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2018-11-18 09:23:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:36,832 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2018-11-18 09:23:36,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 09:23:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2018-11-18 09:23:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 09:23:36,832 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:36,832 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:36,833 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:36,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash -368930583, now seen corresponding path program 1 times [2018-11-18 09:23:36,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:36,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:36,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:36,834 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:36,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:36,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 09:23:36,972 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-18 09:23:36,973 INFO L202 CegarAbsIntRunner]: [4], [5], [9], [15], [17], [21], [23], [26], [32], [34], [37], [41], [47], [49], [53], [57], [59], [64], [67], [70], [106], [109], [110], [111] [2018-11-18 09:23:36,997 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 09:23:36,997 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 09:23:37,216 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 09:23:37,217 INFO L272 AbstractInterpreter]: Visited 24 different actions 70 times. Merged at 16 different actions 46 times. Never widened. Performed 601 root evaluator evaluations with a maximum evaluation depth of 3. Performed 601 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 35 variables. [2018-11-18 09:23:37,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:37,240 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 09:23:37,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:37,240 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:23:37,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:37,258 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:23:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:37,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:37,322 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-18 09:23:37,324 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,331 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,331 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-11-18 09:23:37,347 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-11-18 09:23:37,351 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:37,351 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,353 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,362 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,362 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2018-11-18 09:23:37,366 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:37,367 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:37,368 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-11-18 09:23:37,368 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,374 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:18 [2018-11-18 09:23:37,409 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2018-11-18 09:23:37,411 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:37,412 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,416 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,421 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 09:23:37,422 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2018-11-18 09:23:37,480 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2018-11-18 09:23:37,483 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-11-18 09:23:37,483 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,489 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-18 09:23:37,490 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,491 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,494 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,494 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2018-11-18 09:23:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:37,505 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:37,618 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2018-11-18 09:23:37,619 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2018-11-18 09:23:37,620 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,622 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,623 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2018-11-18 09:23:37,625 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2018-11-18 09:23:37,625 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,628 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:37,636 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2018-11-18 09:23:37,636 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:29, output treesize:27 [2018-11-18 09:23:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:37,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 09:23:37,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2018-11-18 09:23:37,712 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:23:37,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 09:23:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 09:23:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2018-11-18 09:23:37,713 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 11 states. [2018-11-18 09:23:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:37,882 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2018-11-18 09:23:37,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 09:23:37,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-11-18 09:23:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:37,884 INFO L225 Difference]: With dead ends: 78 [2018-11-18 09:23:37,884 INFO L226 Difference]: Without dead ends: 76 [2018-11-18 09:23:37,885 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2018-11-18 09:23:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-18 09:23:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2018-11-18 09:23:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 09:23:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2018-11-18 09:23:37,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 27 [2018-11-18 09:23:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:37,890 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2018-11-18 09:23:37,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 09:23:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2018-11-18 09:23:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 09:23:37,891 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:37,891 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:37,893 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:37,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash -368923639, now seen corresponding path program 1 times [2018-11-18 09:23:37,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:37,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:37,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:37,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:37,895 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:38,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:38,000 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 09:23:38,000 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-18 09:23:38,001 INFO L202 CegarAbsIntRunner]: [4], [5], [9], [15], [17], [21], [23], [26], [32], [34], [37], [41], [47], [49], [53], [57], [59], [64], [74], [77], [106], [109], [110], [111] [2018-11-18 09:23:38,002 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 09:23:38,002 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 09:23:38,096 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 09:23:38,096 INFO L272 AbstractInterpreter]: Visited 24 different actions 70 times. Merged at 16 different actions 46 times. Never widened. Performed 601 root evaluator evaluations with a maximum evaluation depth of 3. Performed 601 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 35 variables. [2018-11-18 09:23:38,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:38,107 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 09:23:38,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:38,108 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:23:38,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:38,125 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:23:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:38,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:38,149 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-18 09:23:38,149 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,151 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,151 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-11-18 09:23:38,185 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-11-18 09:23:38,187 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-11-18 09:23:38,187 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,189 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,198 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,198 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2018-11-18 09:23:38,211 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2018-11-18 09:23:38,214 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:38,215 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 24 [2018-11-18 09:23:38,216 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,220 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,225 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,225 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2018-11-18 09:23:38,240 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:38,241 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:38,241 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-11-18 09:23:38,242 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,248 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,248 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:28 [2018-11-18 09:23:38,304 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 30 [2018-11-18 09:23:38,306 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:38,306 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,310 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,314 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 09:23:38,315 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:29 [2018-11-18 09:23:38,336 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2018-11-18 09:23:38,340 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:38,342 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2018-11-18 09:23:38,342 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,349 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-18 09:23:38,349 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,350 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,352 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,352 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:38, output treesize:4 [2018-11-18 09:23:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:38,358 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:38,461 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2018-11-18 09:23:38,462 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2018-11-18 09:23:38,462 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,463 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,465 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2018-11-18 09:23:38,467 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2018-11-18 09:23:38,468 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:38,469 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 31 [2018-11-18 09:23:38,479 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:38,479 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:38,480 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:38,481 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:38,481 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:38,481 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2018-11-18 09:23:38,482 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,487 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,491 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,496 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:38,505 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-11-18 09:23:38,505 INFO L202 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:36, output treesize:30 [2018-11-18 09:23:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:38,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 09:23:38,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2018-11-18 09:23:38,551 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:23:38,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-18 09:23:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-18 09:23:38,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-11-18 09:23:38,552 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 17 states. [2018-11-18 09:23:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:38,826 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2018-11-18 09:23:38,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 09:23:38,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2018-11-18 09:23:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:38,828 INFO L225 Difference]: With dead ends: 106 [2018-11-18 09:23:38,828 INFO L226 Difference]: Without dead ends: 95 [2018-11-18 09:23:38,828 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2018-11-18 09:23:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-18 09:23:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2018-11-18 09:23:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 09:23:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2018-11-18 09:23:38,834 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 27 [2018-11-18 09:23:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:38,834 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2018-11-18 09:23:38,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-18 09:23:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2018-11-18 09:23:38,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 09:23:38,835 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:38,835 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:38,835 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:38,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:38,836 INFO L82 PathProgramCache]: Analyzing trace with hash -368972309, now seen corresponding path program 1 times [2018-11-18 09:23:38,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:38,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:38,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:38,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:38,837 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 09:23:38,885 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:23:38,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 09:23:38,885 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 09:23:38,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 09:23:38,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 09:23:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:23:38,886 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 7 states. [2018-11-18 09:23:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:38,913 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2018-11-18 09:23:38,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 09:23:38,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-18 09:23:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:38,914 INFO L225 Difference]: With dead ends: 87 [2018-11-18 09:23:38,914 INFO L226 Difference]: Without dead ends: 83 [2018-11-18 09:23:38,915 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:23:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-18 09:23:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2018-11-18 09:23:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-18 09:23:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2018-11-18 09:23:38,922 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 27 [2018-11-18 09:23:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:38,923 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2018-11-18 09:23:38,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 09:23:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2018-11-18 09:23:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 09:23:38,923 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:38,923 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:38,924 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:38,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:38,924 INFO L82 PathProgramCache]: Analyzing trace with hash 311086061, now seen corresponding path program 1 times [2018-11-18 09:23:38,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:38,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:38,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:38,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:38,925 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:38,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:38,973 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 09:23:38,973 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-18 09:23:38,973 INFO L202 CegarAbsIntRunner]: [4], [5], [9], [15], [17], [21], [23], [26], [28], [32], [34], [37], [41], [47], [49], [53], [57], [59], [62], [85], [88], [106], [109], [110], [111] [2018-11-18 09:23:38,974 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 09:23:38,975 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 09:23:39,030 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 09:23:39,030 INFO L272 AbstractInterpreter]: Visited 25 different actions 59 times. Merged at 16 different actions 32 times. Never widened. Performed 431 root evaluator evaluations with a maximum evaluation depth of 3. Performed 431 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 34 variables. [2018-11-18 09:23:39,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:39,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 09:23:39,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:39,032 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/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 [2018-11-18 09:23:39,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:39,042 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:23:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:39,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:39,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:39,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 09:23:39,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2018-11-18 09:23:39,102 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 09:23:39,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 09:23:39,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 09:23:39,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-11-18 09:23:39,103 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 11 states. [2018-11-18 09:23:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:39,221 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2018-11-18 09:23:39,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-18 09:23:39,221 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-11-18 09:23:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:39,222 INFO L225 Difference]: With dead ends: 173 [2018-11-18 09:23:39,222 INFO L226 Difference]: Without dead ends: 106 [2018-11-18 09:23:39,223 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2018-11-18 09:23:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-18 09:23:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2018-11-18 09:23:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-18 09:23:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2018-11-18 09:23:39,231 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 27 [2018-11-18 09:23:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:39,232 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2018-11-18 09:23:39,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 09:23:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2018-11-18 09:23:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 09:23:39,232 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:39,233 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:39,233 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:39,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:39,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1648794261, now seen corresponding path program 1 times [2018-11-18 09:23:39,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 09:23:39,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:39,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:39,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:23:39,234 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 09:23:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:39,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:39,337 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 09:23:39,337 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-18 09:23:39,337 INFO L202 CegarAbsIntRunner]: [4], [5], [9], [15], [17], [21], [23], [26], [32], [34], [39], [41], [47], [49], [53], [57], [59], [64], [67], [70], [106], [109], [110], [111] [2018-11-18 09:23:39,338 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 09:23:39,339 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 09:23:39,396 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 09:23:39,396 INFO L272 AbstractInterpreter]: Visited 24 different actions 70 times. Merged at 16 different actions 46 times. Never widened. Performed 601 root evaluator evaluations with a maximum evaluation depth of 3. Performed 601 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 35 variables. [2018-11-18 09:23:39,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:39,397 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 09:23:39,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:39,397 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/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 [2018-11-18 09:23:39,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:39,412 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 09:23:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:39,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:39,429 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-18 09:23:39,429 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,435 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,435 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-11-18 09:23:39,465 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-11-18 09:23:39,467 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-11-18 09:23:39,467 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,469 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,475 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,475 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2018-11-18 09:23:39,490 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-11-18 09:23:39,492 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:39,493 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:39,493 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 33 [2018-11-18 09:23:39,494 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,500 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,506 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,506 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2018-11-18 09:23:39,523 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:39,524 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:39,525 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-11-18 09:23:39,525 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,531 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:27 [2018-11-18 09:23:39,562 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2018-11-18 09:23:39,564 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:39,564 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,569 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,573 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 09:23:39,574 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:28 [2018-11-18 09:23:39,593 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2018-11-18 09:23:39,594 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-18 09:23:39,594 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,601 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:39,602 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:39,602 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2018-11-18 09:23:39,603 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,607 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,610 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:37, output treesize:3 [2018-11-18 09:23:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:39,617 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:39,713 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 42 [2018-11-18 09:23:39,728 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-11-18 09:23:39,730 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,731 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,732 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 33 [2018-11-18 09:23:39,732 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,738 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,740 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2018-11-18 09:23:39,742 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,743 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,743 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-11-18 09:23:39,744 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,750 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,766 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2018-11-18 09:23:39,775 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,776 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,780 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2018-11-18 09:23:39,781 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2018-11-18 09:23:39,783 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,784 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,784 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 12 [2018-11-18 09:23:39,784 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,794 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:23:39,800 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2018-11-18 09:23:39,828 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2018-11-18 09:23:39,829 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,830 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2018-11-18 09:23:39,831 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,849 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,850 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,854 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2018-11-18 09:23:39,855 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 2 xjuncts. [2018-11-18 09:23:39,858 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,859 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,859 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2018-11-18 09:23:39,860 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,882 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,883 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,888 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2018-11-18 09:23:39,889 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2018-11-18 09:23:39,898 INFO L267 ElimStorePlain]: Start of recursive call 10: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:23:39,900 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-11-18 09:23:39,902 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,903 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,903 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 5 [2018-11-18 09:23:39,904 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,911 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-11-18 09:23:39,911 INFO L267 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,913 INFO L267 ElimStorePlain]: Start of recursive call 16: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,922 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-11-18 09:23:39,926 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 35 [2018-11-18 09:23:39,935 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2018-11-18 09:23:39,937 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,937 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,938 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 33 [2018-11-18 09:23:39,938 INFO L267 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,942 INFO L267 ElimStorePlain]: Start of recursive call 20: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,954 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2018-11-18 09:23:39,956 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,957 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,960 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2018-11-18 09:23:39,961 INFO L267 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 2 xjuncts. [2018-11-18 09:23:39,970 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,971 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,971 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 16 [2018-11-18 09:23:39,971 INFO L267 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,977 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2018-11-18 09:23:39,977 INFO L267 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,980 INFO L267 ElimStorePlain]: Start of recursive call 22: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:23:39,981 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2018-11-18 09:23:39,983 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,983 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:39,984 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 5 [2018-11-18 09:23:39,984 INFO L267 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,987 INFO L267 ElimStorePlain]: Start of recursive call 26: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:39,992 INFO L267 ElimStorePlain]: Start of recursive call 19: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:23:40,008 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 72 [2018-11-18 09:23:40,098 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2018-11-18 09:23:40,100 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,100 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,101 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-11-18 09:23:40,101 INFO L267 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,108 INFO L267 ElimStorePlain]: Start of recursive call 29: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,109 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2018-11-18 09:23:40,111 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,112 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,112 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-11-18 09:23:40,113 INFO L267 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,121 INFO L267 ElimStorePlain]: Start of recursive call 31: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,122 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2018-11-18 09:23:40,124 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,124 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,125 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 33 [2018-11-18 09:23:40,125 INFO L267 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,135 INFO L267 ElimStorePlain]: Start of recursive call 33: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,199 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2018-11-18 09:23:40,201 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,202 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,202 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 33 [2018-11-18 09:23:40,203 INFO L267 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,210 INFO L267 ElimStorePlain]: Start of recursive call 35: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,213 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2018-11-18 09:23:40,220 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2018-11-18 09:23:40,220 INFO L267 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,229 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,230 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,230 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-11-18 09:23:40,231 INFO L267 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,239 INFO L267 ElimStorePlain]: Start of recursive call 37: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,305 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2018-11-18 09:23:40,307 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2018-11-18 09:23:40,307 INFO L267 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,320 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,320 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,321 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2018-11-18 09:23:40,321 INFO L267 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,334 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,335 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,338 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2018-11-18 09:23:40,339 INFO L267 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 2 xjuncts. [2018-11-18 09:23:40,350 INFO L267 ElimStorePlain]: Start of recursive call 40: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:23:40,355 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2018-11-18 09:23:40,390 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,391 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,394 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2018-11-18 09:23:40,395 INFO L267 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 2 xjuncts. [2018-11-18 09:23:40,414 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,415 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,416 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2018-11-18 09:23:40,416 INFO L267 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,426 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-11-18 09:23:40,427 INFO L267 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,433 INFO L267 ElimStorePlain]: Start of recursive call 44: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:23:40,435 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2018-11-18 09:23:40,437 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,437 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,437 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 5 [2018-11-18 09:23:40,438 INFO L267 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,442 INFO L267 ElimStorePlain]: Start of recursive call 48: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:40,502 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 39 [2018-11-18 09:23:40,505 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:40,706 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:23:40,707 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: v_prenex_11 term size 22 at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.Elim1Store.elim1(Elim1Store.java:452) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:221) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:225) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:225) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.elimAllRec(ElimStorePlain.java:199) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:293) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:214) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-11-18 09:23:40,709 INFO L168 Benchmark]: Toolchain (without parser) took 4967.84 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 308.8 MB). Free memory was 956.5 MB in the beginning and 1.1 GB in the end (delta: -185.0 MB). Peak memory consumption was 366.1 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:40,710 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:23:40,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 956.5 MB in the beginning and 1.1 GB in the end (delta: -184.5 MB). Peak memory consumption was 38.6 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:40,711 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:23:40,711 INFO L168 Benchmark]: Boogie Preprocessor took 22.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:40,711 INFO L168 Benchmark]: RCFGBuilder took 220.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:40,711 INFO L168 Benchmark]: TraceAbstraction took 4385.70 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 154.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -26.4 MB). Peak memory consumption was 370.6 MB. Max. memory is 11.5 GB. [2018-11-18 09:23:40,712 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 316.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 154.1 MB). Free memory was 956.5 MB in the beginning and 1.1 GB in the end (delta: -184.5 MB). Peak memory consumption was 38.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 220.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4385.70 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 154.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -26.4 MB). Peak memory consumption was 370.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: v_prenex_11 term size 22 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: v_prenex_11 term size 22: de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.Elim1Store.elim1(Elim1Store.java:452) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-5842f4b [2018-11-18 09:23:42,142 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:23:42,143 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:23:42,151 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:23:42,151 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:23:42,152 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:23:42,152 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:23:42,154 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:23:42,155 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:23:42,156 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:23:42,156 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:23:42,156 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:23:42,157 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:23:42,158 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:23:42,158 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:23:42,160 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:23:42,160 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:23:42,161 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:23:42,162 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:23:42,164 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:23:42,165 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:23:42,165 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:23:42,167 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:23:42,168 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:23:42,168 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:23:42,168 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:23:42,169 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:23:42,169 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:23:42,170 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:23:42,171 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:23:42,171 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:23:42,172 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:23:42,172 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:23:42,172 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:23:42,173 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:23:42,173 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:23:42,174 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-18 09:23:42,184 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:23:42,184 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:23:42,184 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 09:23:42,185 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 09:23:42,185 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 09:23:42,185 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 09:23:42,185 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 09:23:42,185 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 09:23:42,185 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 09:23:42,186 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 09:23:42,186 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:23:42,186 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 09:23:42,186 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 09:23:42,188 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:23:42,188 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 09:23:42,188 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:23:42,188 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 09:23:42,188 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-18 09:23:42,188 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-18 09:23:42,188 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 09:23:42,189 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 09:23:42,189 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:23:42,189 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 09:23:42,189 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:23:42,189 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:23:42,189 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:23:42,190 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:23:42,190 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:23:42,190 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:23:42,190 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:23:42,190 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 09:23:42,190 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-18 09:23:42,190 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:23:42,191 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-18 09:23:42,191 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-18 09:23:42,191 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/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 -> 7be19e93bdd948471bb5345505ca5c828fc1d47b [2018-11-18 09:23:42,222 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:23:42,231 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:23:42,234 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:23:42,235 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:23:42,235 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:23:42,236 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/../../sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i [2018-11-18 09:23:42,279 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data/286b22a66/87db2bdd09844c05b37540a3ae805fe2/FLAG631ee95de [2018-11-18 09:23:42,710 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:23:42,711 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/sv-benchmarks/c/list-ext-properties/list-ext_flag_false-unreach-call_false-valid-deref.i [2018-11-18 09:23:42,717 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data/286b22a66/87db2bdd09844c05b37540a3ae805fe2/FLAG631ee95de [2018-11-18 09:23:42,725 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/data/286b22a66/87db2bdd09844c05b37540a3ae805fe2 [2018-11-18 09:23:42,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:23:42,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 09:23:42,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:23:42,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:23:42,731 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:23:42,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:23:42" (1/1) ... [2018-11-18 09:23:42,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b715490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:42, skipping insertion in model container [2018-11-18 09:23:42,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:23:42" (1/1) ... [2018-11-18 09:23:42,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:23:42,771 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:23:42,989 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:23:42,998 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:23:43,030 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:23:43,100 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:23:43,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43 WrapperNode [2018-11-18 09:23:43,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:23:43,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 09:23:43,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 09:23:43,101 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 09:23:43,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... [2018-11-18 09:23:43,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... [2018-11-18 09:23:43,123 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 09:23:43,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:23:43,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:23:43,123 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:23:43,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... [2018-11-18 09:23:43,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... [2018-11-18 09:23:43,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... [2018-11-18 09:23:43,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... [2018-11-18 09:23:43,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... [2018-11-18 09:23:43,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... [2018-11-18 09:23:43,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... [2018-11-18 09:23:43,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:23:43,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:23:43,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:23:43,147 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:23:43,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/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 [2018-11-18 09:23:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 09:23:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2018-11-18 09:23:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-18 09:23:43,178 INFO L138 BoogieDeclarations]: Found implementation of procedure exit [2018-11-18 09:23:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:23:43,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:23:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:23:43,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:23:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-18 09:23:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-18 09:23:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 09:23:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-11-18 09:23:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:23:43,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:23:43,389 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:23:43,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:23:43 BoogieIcfgContainer [2018-11-18 09:23:43,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:23:43,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:23:43,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:23:43,392 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:23:43,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:23:42" (1/3) ... [2018-11-18 09:23:43,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d5b0ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:23:43, skipping insertion in model container [2018-11-18 09:23:43,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:23:43" (2/3) ... [2018-11-18 09:23:43,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d5b0ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:23:43, skipping insertion in model container [2018-11-18 09:23:43,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:23:43" (3/3) ... [2018-11-18 09:23:43,394 INFO L112 eAbstractionObserver]: Analyzing ICFG list-ext_flag_false-unreach-call_false-valid-deref.i [2018-11-18 09:23:43,400 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:23:43,405 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 09:23:43,413 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 09:23:43,432 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 09:23:43,432 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:23:43,432 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 09:23:43,432 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:23:43,432 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:23:43,432 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:23:43,433 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:23:43,433 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:23:43,433 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:23:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2018-11-18 09:23:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 09:23:43,448 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:43,448 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:43,450 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:43,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2084346842, now seen corresponding path program 1 times [2018-11-18 09:23:43,455 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:23:43,455 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:23:43,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:43,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:43,520 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 09:23:43,523 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:23:43,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 09:23:43,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 09:23:43,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 09:23:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 09:23:43,535 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2018-11-18 09:23:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:43,548 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2018-11-18 09:23:43,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 09:23:43,549 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-11-18 09:23:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:43,556 INFO L225 Difference]: With dead ends: 58 [2018-11-18 09:23:43,556 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 09:23:43,559 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 09:23:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 09:23:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-18 09:23:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 09:23:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2018-11-18 09:23:43,581 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2018-11-18 09:23:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:43,581 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2018-11-18 09:23:43,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 09:23:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2018-11-18 09:23:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 09:23:43,582 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:43,582 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:43,583 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:43,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1427101841, now seen corresponding path program 1 times [2018-11-18 09:23:43,583 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:23:43,584 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:23:43,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:43,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:43,724 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-11-18 09:23:43,736 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2018-11-18 09:23:43,736 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:43,756 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:43,800 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:43,800 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:20, output treesize:9 [2018-11-18 09:23:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:43,830 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 09:23:43,831 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:23:43,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 09:23:43,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 09:23:43,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 09:23:43,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:23:43,833 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 6 states. [2018-11-18 09:23:43,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:43,884 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2018-11-18 09:23:43,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 09:23:43,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-11-18 09:23:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:43,885 INFO L225 Difference]: With dead ends: 42 [2018-11-18 09:23:43,885 INFO L226 Difference]: Without dead ends: 38 [2018-11-18 09:23:43,886 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-18 09:23:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-18 09:23:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2018-11-18 09:23:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 09:23:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2018-11-18 09:23:43,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17 [2018-11-18 09:23:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:43,890 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2018-11-18 09:23:43,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 09:23:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2018-11-18 09:23:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 09:23:43,891 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:43,891 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:43,891 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:43,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1427150511, now seen corresponding path program 1 times [2018-11-18 09:23:43,891 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:23:43,892 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:23:43,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:43,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:43,950 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-11-18 09:23:43,953 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:43,953 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:43,956 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:43,961 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:43,961 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2018-11-18 09:23:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:44,001 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-18 09:23:44,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:23:44,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 09:23:44,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 09:23:44,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 09:23:44,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 09:23:44,008 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2018-11-18 09:23:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:44,152 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2018-11-18 09:23:44,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 09:23:44,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-11-18 09:23:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:44,154 INFO L225 Difference]: With dead ends: 58 [2018-11-18 09:23:44,154 INFO L226 Difference]: Without dead ends: 43 [2018-11-18 09:23:44,154 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-18 09:23:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-11-18 09:23:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-11-18 09:23:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 09:23:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2018-11-18 09:23:44,158 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2018-11-18 09:23:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:44,159 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2018-11-18 09:23:44,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 09:23:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2018-11-18 09:23:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 09:23:44,159 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:44,160 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:44,160 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:44,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:44,160 INFO L82 PathProgramCache]: Analyzing trace with hash -916872537, now seen corresponding path program 1 times [2018-11-18 09:23:44,161 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:23:44,161 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:23:44,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:44,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:44,244 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-11-18 09:23:44,263 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2018-11-18 09:23:44,264 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,265 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,270 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,270 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:22, output treesize:11 [2018-11-18 09:23:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:44,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:44,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:44,379 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:23:44,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:44,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:44,414 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2018-11-18 09:23:44,417 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2018-11-18 09:23:44,417 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,418 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,422 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,422 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:22, output treesize:11 [2018-11-18 09:23:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:44,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:44,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 09:23:44,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 12 [2018-11-18 09:23:44,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 09:23:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 09:23:44,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-11-18 09:23:44,452 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 12 states. [2018-11-18 09:23:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:44,721 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2018-11-18 09:23:44,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 09:23:44,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-11-18 09:23:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:44,722 INFO L225 Difference]: With dead ends: 77 [2018-11-18 09:23:44,722 INFO L226 Difference]: Without dead ends: 69 [2018-11-18 09:23:44,723 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2018-11-18 09:23:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-18 09:23:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2018-11-18 09:23:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 09:23:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2018-11-18 09:23:44,729 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 23 [2018-11-18 09:23:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:44,729 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2018-11-18 09:23:44,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 09:23:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2018-11-18 09:23:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 09:23:44,730 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:44,730 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:44,730 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:44,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash -916823867, now seen corresponding path program 1 times [2018-11-18 09:23:44,731 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:23:44,731 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:23:44,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:44,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:44,780 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-18 09:23:44,781 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,784 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,785 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-11-18 09:23:44,820 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-11-18 09:23:44,822 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:44,823 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,825 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,838 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2018-11-18 09:23:44,858 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:44,859 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:44,860 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2018-11-18 09:23:44,860 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,878 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,878 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:21 [2018-11-18 09:23:44,918 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2018-11-18 09:23:44,921 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:44,921 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,926 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,933 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 09:23:44,934 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2018-11-18 09:23:44,964 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2018-11-18 09:23:44,968 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2018-11-18 09:23:44,968 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,975 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2018-11-18 09:23:44,975 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,977 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,980 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:44,980 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:30, output treesize:5 [2018-11-18 09:23:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:44,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:51,136 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2018-11-18 09:23:51,154 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 8 [2018-11-18 09:23:51,154 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,166 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2018-11-18 09:23:51,168 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2018-11-18 09:23:51,168 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,172 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,182 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2018-11-18 09:23:51,185 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2018-11-18 09:23:51,186 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,201 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2018-11-18 09:23:51,202 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,211 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2018-11-18 09:23:51,211 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,215 INFO L267 ElimStorePlain]: Start of recursive call 6: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:23:51,223 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-11-18 09:23:51,234 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2018-11-18 09:23:51,234 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2018-11-18 09:23:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:51,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:51,377 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:23:51,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:51,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:51,401 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-18 09:23:51,402 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,403 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,403 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-11-18 09:23:51,442 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-11-18 09:23:51,443 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:51,444 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,445 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,453 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,453 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2018-11-18 09:23:51,496 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2018-11-18 09:23:51,497 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,504 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,504 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:18 [2018-11-18 09:23:51,563 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 20 [2018-11-18 09:23:51,565 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:51,566 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,571 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,577 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 09:23:51,578 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2018-11-18 09:23:51,628 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2018-11-18 09:23:51,630 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2018-11-18 09:23:51,630 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,636 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2018-11-18 09:23:51,637 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,638 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,641 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,642 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:30, output treesize:5 [2018-11-18 09:23:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:51,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:51,744 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2018-11-18 09:23:51,760 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 8 [2018-11-18 09:23:51,760 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,780 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2018-11-18 09:23:51,783 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2018-11-18 09:23:51,783 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,795 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2018-11-18 09:23:51,795 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,805 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2018-11-18 09:23:51,805 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,809 INFO L267 ElimStorePlain]: Start of recursive call 4: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:23:51,810 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2018-11-18 09:23:51,812 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2018-11-18 09:23:51,812 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,815 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:51,822 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-11-18 09:23:51,832 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2018-11-18 09:23:51,833 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2018-11-18 09:23:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:51,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-18 09:23:51,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 21 [2018-11-18 09:23:51,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-18 09:23:51,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-18 09:23:51,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=340, Unknown=3, NotChecked=0, Total=420 [2018-11-18 09:23:51,884 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 21 states. [2018-11-18 09:23:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:23:52,785 INFO L93 Difference]: Finished difference Result 153 states and 191 transitions. [2018-11-18 09:23:52,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 09:23:52,786 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2018-11-18 09:23:52,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:23:52,788 INFO L225 Difference]: With dead ends: 153 [2018-11-18 09:23:52,788 INFO L226 Difference]: Without dead ends: 151 [2018-11-18 09:23:52,789 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=174, Invalid=579, Unknown=3, NotChecked=0, Total=756 [2018-11-18 09:23:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-11-18 09:23:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2018-11-18 09:23:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-18 09:23:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 117 transitions. [2018-11-18 09:23:52,799 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 117 transitions. Word has length 23 [2018-11-18 09:23:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:23:52,799 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 117 transitions. [2018-11-18 09:23:52,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-18 09:23:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 117 transitions. [2018-11-18 09:23:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 09:23:52,800 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:23:52,800 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:23:52,800 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 09:23:52,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:23:52,800 INFO L82 PathProgramCache]: Analyzing trace with hash -916830811, now seen corresponding path program 1 times [2018-11-18 09:23:52,800 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-18 09:23:52,800 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-18 09:23:52,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:52,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:52,848 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-18 09:23:52,849 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:52,853 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:52,853 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-11-18 09:23:52,883 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-11-18 09:23:52,885 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:52,886 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:52,886 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 33 [2018-11-18 09:23:52,887 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:52,892 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:52,904 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:52,904 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2018-11-18 09:23:52,930 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:52,932 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:52,932 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2018-11-18 09:23:52,932 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:52,946 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:52,946 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:30 [2018-11-18 09:23:52,991 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 27 [2018-11-18 09:23:52,994 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:52,994 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:53,002 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:53,012 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 09:23:53,012 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:29 [2018-11-18 09:23:53,048 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2018-11-18 09:23:53,050 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2018-11-18 09:23:53,051 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:53,060 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:53,061 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2018-11-18 09:23:53,061 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:53,065 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:53,069 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:53,070 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:37, output treesize:3 [2018-11-18 09:23:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:53,084 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:23:54,640 WARN L180 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-18 09:23:54,651 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 35 [2018-11-18 09:23:54,678 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:54,678 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:54,679 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 33 [2018-11-18 09:23:54,679 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,717 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2018-11-18 09:23:54,721 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2018-11-18 09:23:54,721 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,743 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:54,745 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:54,751 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2018-11-18 09:23:54,752 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2018-11-18 09:23:54,770 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:54,770 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:54,770 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 9 [2018-11-18 09:23:54,771 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,776 INFO L267 ElimStorePlain]: Start of recursive call 4: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:23:54,779 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2018-11-18 09:23:54,781 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:54,782 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:23:54,782 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 5 [2018-11-18 09:23:54,782 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,788 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,798 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-11-18 09:23:54,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2018-11-18 09:23:54,812 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:50, output treesize:31 [2018-11-18 09:23:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:54,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 09:23:54,883 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2c0a52b8-a456-4f7a-b60a-f9673f20e1d4/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:23:54,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:23:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:23:54,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 09:23:54,924 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-11-18 09:23:54,925 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,934 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,934 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-11-18 09:23:54,943 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-11-18 09:23:54,946 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-11-18 09:23:54,946 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,949 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,961 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,961 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:26 [2018-11-18 09:23:54,966 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-11-18 09:23:54,968 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:54,969 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:54,970 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 33 [2018-11-18 09:23:54,970 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,978 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,988 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:54,988 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2018-11-18 09:23:54,992 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:54,995 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:54,995 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2018-11-18 09:23:54,996 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:55,010 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:55,011 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:30 [2018-11-18 09:23:55,030 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 27 [2018-11-18 09:23:55,033 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-11-18 09:23:55,033 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:55,041 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:55,051 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 09:23:55,051 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:29 [2018-11-18 09:23:55,070 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2018-11-18 09:23:55,073 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 09:23:55,074 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2018-11-18 09:23:55,074 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:55,083 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2018-11-18 09:23:55,084 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 09:23:55,085 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:55,089 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:23:55,089 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:37, output treesize:3 [2018-11-18 09:23:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:23:55,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 09:24:00,482 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 42 [2018-11-18 09:24:00,515 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2018-11-18 09:24:00,518 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,518 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,519 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-11-18 09:24:00,519 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,533 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,536 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2018-11-18 09:24:00,539 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,539 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,540 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 33 [2018-11-18 09:24:00,540 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,553 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,615 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2018-11-18 09:24:00,687 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2018-11-18 09:24:00,687 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,692 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2018-11-18 09:24:00,692 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,734 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,740 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,747 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2018-11-18 09:24:00,747 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2018-11-18 09:24:00,781 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,782 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,782 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2018-11-18 09:24:00,783 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,793 INFO L267 ElimStorePlain]: Start of recursive call 7: 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:24:00,796 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2018-11-18 09:24:00,818 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,819 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,819 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 12 [2018-11-18 09:24:00,820 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,822 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,824 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,830 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2018-11-18 09:24:00,831 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2018-11-18 09:24:00,847 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:24:00,851 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-11-18 09:24:00,854 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2018-11-18 09:24:00,854 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,864 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,864 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:00,865 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 5 [2018-11-18 09:24:00,865 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,869 INFO L267 ElimStorePlain]: Start of recursive call 15: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:24:00,900 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-11-18 09:24:00,992 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 72 [2018-11-18 09:24:01,338 WARN L180 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2018-11-18 09:24:01,343 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2018-11-18 09:24:01,347 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,348 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,348 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-11-18 09:24:01,349 INFO L267 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,369 INFO L267 ElimStorePlain]: Start of recursive call 19: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,373 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2018-11-18 09:24:01,378 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,378 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,379 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-11-18 09:24:01,379 INFO L267 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,409 INFO L267 ElimStorePlain]: Start of recursive call 21: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,422 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2018-11-18 09:24:01,425 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,426 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,426 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 33 [2018-11-18 09:24:01,426 INFO L267 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,446 INFO L267 ElimStorePlain]: Start of recursive call 23: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,728 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2018-11-18 09:24:01,741 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2018-11-18 09:24:01,742 INFO L267 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,769 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,770 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,770 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-11-18 09:24:01,771 INFO L267 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,788 INFO L267 ElimStorePlain]: Start of recursive call 25: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,791 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2018-11-18 09:24:01,794 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,795 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:01,795 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 33 [2018-11-18 09:24:01,795 INFO L267 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:01,820 INFO L267 ElimStorePlain]: Start of recursive call 28: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 09:24:02,063 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 62 [2018-11-18 09:24:02,075 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2018-11-18 09:24:02,081 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:02,087 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:02,088 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 37 [2018-11-18 09:24:02,125 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:02,128 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:02,135 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2018-11-18 09:24:02,135 INFO L267 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 2 xjuncts. [2018-11-18 09:24:02,140 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:02,141 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:02,141 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 12 [2018-11-18 09:24:02,141 INFO L267 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:02,158 INFO L267 ElimStorePlain]: Start of recursive call 32: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:24:02,182 INFO L267 ElimStorePlain]: Start of recursive call 31: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 09:24:02,519 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2018-11-18 09:24:02,519 INFO L267 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:02,524 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-11-18 09:24:02,524 INFO L267 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2018-11-18 09:24:02,826 INFO L682 Elim1Store]: detected equality via solver [2018-11-18 09:24:03,027 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 09:24:03,028 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: var is still there: v_arrayElimCell_56 term size 19 at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.Elim1Store.elim1(Elim1Store.java:452) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:221) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:225) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:225) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:247) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.ElimStorePlain.elimAllRec(ElimStorePlain.java:199) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:293) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-11-18 09:24:03,030 INFO L168 Benchmark]: Toolchain (without parser) took 20302.98 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 255.9 MB). Free memory was 945.2 MB in the beginning and 1.2 GB in the end (delta: -269.5 MB). Peak memory consumption was 343.0 MB. Max. memory is 11.5 GB. [2018-11-18 09:24:03,030 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:24:03,030 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -184.5 MB). Peak memory consumption was 44.8 MB. Max. memory is 11.5 GB. [2018-11-18 09:24:03,030 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2018-11-18 09:24:03,030 INFO L168 Benchmark]: Boogie Preprocessor took 23.28 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:24:03,031 INFO L168 Benchmark]: RCFGBuilder took 243.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.9 MB). Peak memory consumption was 30.9 MB. Max. memory is 11.5 GB. [2018-11-18 09:24:03,031 INFO L168 Benchmark]: TraceAbstraction took 19639.49 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 119.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -122.4 MB). Peak memory consumption was 353.8 MB. Max. memory is 11.5 GB. [2018-11-18 09:24:03,032 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 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 372.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -184.5 MB). Peak memory consumption was 44.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.28 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 243.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.9 MB). Peak memory consumption was 30.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19639.49 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 119.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -122.4 MB). Peak memory consumption was 353.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: var is still there: v_arrayElimCell_56 term size 19 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: var is still there: v_arrayElimCell_56 term size 19: de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.Elim1Store.elim1(Elim1Store.java:452) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...