./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 162af48526beed8ce59715aaad1198a79a3197bf ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 162af48526beed8ce59715aaad1198a79a3197bf ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 20:08:31,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 20:08:31,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 20:08:31,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 20:08:31,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 20:08:31,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 20:08:31,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 20:08:31,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 20:08:31,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 20:08:31,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 20:08:31,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 20:08:31,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 20:08:31,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 20:08:31,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 20:08:31,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 20:08:31,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 20:08:31,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 20:08:31,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 20:08:31,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 20:08:31,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 20:08:31,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 20:08:31,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 20:08:31,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 20:08:31,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 20:08:31,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 20:08:31,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 20:08:31,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 20:08:31,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 20:08:31,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 20:08:31,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 20:08:31,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 20:08:31,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 20:08:31,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 20:08:31,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 20:08:31,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 20:08:31,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 20:08:31,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 20:08:31,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 20:08:31,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 20:08:31,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 20:08:31,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 20:08:31,051 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 20:08:31,065 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 20:08:31,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 20:08:31,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 20:08:31,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 20:08:31,067 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 20:08:31,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 20:08:31,067 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 20:08:31,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 20:08:31,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 20:08:31,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 20:08:31,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 20:08:31,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 20:08:31,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 20:08:31,069 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 20:08:31,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 20:08:31,069 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 20:08:31,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 20:08:31,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 20:08:31,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 20:08:31,070 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 20:08:31,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 20:08:31,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 20:08:31,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 20:08:31,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 20:08:31,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 20:08:31,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 20:08:31,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 20:08:31,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 20:08:31,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer 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 -> Automizer 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 -> 162af48526beed8ce59715aaad1198a79a3197bf [2019-11-15 20:08:31,112 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 20:08:31,122 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 20:08:31,131 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 20:08:31,133 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 20:08:31,133 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 20:08:31,134 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/../../sv-benchmarks/c/array-tiling/mbpr4.c [2019-11-15 20:08:31,185 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data/a08aa24db/72efcb31498a43c28e7bb8e854606b31/FLAGb830d2866 [2019-11-15 20:08:31,615 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 20:08:31,615 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/sv-benchmarks/c/array-tiling/mbpr4.c [2019-11-15 20:08:31,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data/a08aa24db/72efcb31498a43c28e7bb8e854606b31/FLAGb830d2866 [2019-11-15 20:08:31,642 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data/a08aa24db/72efcb31498a43c28e7bb8e854606b31 [2019-11-15 20:08:31,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 20:08:31,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 20:08:31,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 20:08:31,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 20:08:31,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 20:08:31,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:08:31" (1/1) ... [2019-11-15 20:08:31,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ebef4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:31, skipping insertion in model container [2019-11-15 20:08:31,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:08:31" (1/1) ... [2019-11-15 20:08:31,664 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 20:08:31,694 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 20:08:31,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:08:31,978 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 20:08:32,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:08:32,025 INFO L192 MainTranslator]: Completed translation [2019-11-15 20:08:32,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32 WrapperNode [2019-11-15 20:08:32,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 20:08:32,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 20:08:32,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 20:08:32,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 20:08:32,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... [2019-11-15 20:08:32,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... [2019-11-15 20:08:32,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 20:08:32,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 20:08:32,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 20:08:32,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 20:08:32,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... [2019-11-15 20:08:32,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... [2019-11-15 20:08:32,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... [2019-11-15 20:08:32,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... [2019-11-15 20:08:32,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... [2019-11-15 20:08:32,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... [2019-11-15 20:08:32,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... [2019-11-15 20:08:32,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 20:08:32,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 20:08:32,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 20:08:32,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 20:08:32,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/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 [2019-11-15 20:08:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 20:08:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 20:08:32,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 20:08:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 20:08:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 20:08:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 20:08:32,520 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 20:08:32,521 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-15 20:08:32,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:08:32 BoogieIcfgContainer [2019-11-15 20:08:32,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 20:08:32,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 20:08:32,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 20:08:32,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 20:08:32,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 08:08:31" (1/3) ... [2019-11-15 20:08:32,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690eabe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:08:32, skipping insertion in model container [2019-11-15 20:08:32,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:32" (2/3) ... [2019-11-15 20:08:32,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690eabe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:08:32, skipping insertion in model container [2019-11-15 20:08:32,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:08:32" (3/3) ... [2019-11-15 20:08:32,529 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2019-11-15 20:08:32,538 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 20:08:32,545 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 20:08:32,555 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 20:08:32,577 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 20:08:32,577 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 20:08:32,577 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 20:08:32,577 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 20:08:32,578 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 20:08:32,578 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 20:08:32,578 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 20:08:32,579 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 20:08:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-11-15 20:08:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 20:08:32,600 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:32,600 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:32,602 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:32,606 INFO L82 PathProgramCache]: Analyzing trace with hash 219549199, now seen corresponding path program 1 times [2019-11-15 20:08:32,612 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:08:32,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735223383] [2019-11-15 20:08:32,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:32,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:32,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:08:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:32,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735223383] [2019-11-15 20:08:32,735 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:08:32,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 20:08:32,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440594115] [2019-11-15 20:08:32,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 20:08:32,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:08:32,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 20:08:32,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 20:08:32,754 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-11-15 20:08:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:32,772 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2019-11-15 20:08:32,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 20:08:32,774 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-15 20:08:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:32,783 INFO L225 Difference]: With dead ends: 66 [2019-11-15 20:08:32,783 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 20:08:32,786 INFO L600 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 [2019-11-15 20:08:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 20:08:32,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 20:08:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 20:08:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-11-15 20:08:32,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2019-11-15 20:08:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:32,818 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-11-15 20:08:32,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 20:08:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-11-15 20:08:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 20:08:32,819 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:32,820 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:32,820 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:32,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1179538664, now seen corresponding path program 1 times [2019-11-15 20:08:32,821 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:08:32,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161907338] [2019-11-15 20:08:32,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:32,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:32,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:08:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:32,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161907338] [2019-11-15 20:08:32,912 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:08:32,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 20:08:32,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364213690] [2019-11-15 20:08:32,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 20:08:32,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:08:32,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 20:08:32,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:08:32,915 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 4 states. [2019-11-15 20:08:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:32,992 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-15 20:08:32,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 20:08:32,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-15 20:08:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:32,994 INFO L225 Difference]: With dead ends: 41 [2019-11-15 20:08:32,994 INFO L226 Difference]: Without dead ends: 39 [2019-11-15 20:08:32,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 20:08:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-15 20:08:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2019-11-15 20:08:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-15 20:08:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-11-15 20:08:33,001 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2019-11-15 20:08:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:33,001 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-11-15 20:08:33,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 20:08:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-11-15 20:08:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 20:08:33,002 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:33,002 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:33,003 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:33,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:33,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1179598246, now seen corresponding path program 1 times [2019-11-15 20:08:33,003 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:08:33,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578707354] [2019-11-15 20:08:33,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:33,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:33,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:08:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:33,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578707354] [2019-11-15 20:08:33,222 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:08:33,222 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 20:08:33,222 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804605070] [2019-11-15 20:08:33,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 20:08:33,223 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:08:33,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 20:08:33,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:08:33,223 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-11-15 20:08:33,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:33,344 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2019-11-15 20:08:33,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 20:08:33,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-15 20:08:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:33,347 INFO L225 Difference]: With dead ends: 64 [2019-11-15 20:08:33,347 INFO L226 Difference]: Without dead ends: 38 [2019-11-15 20:08:33,347 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:08:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-15 20:08:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-15 20:08:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-15 20:08:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-15 20:08:33,358 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2019-11-15 20:08:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:33,359 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-15 20:08:33,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 20:08:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-15 20:08:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 20:08:33,361 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:33,361 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:33,361 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:33,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:33,362 INFO L82 PathProgramCache]: Analyzing trace with hash -130988767, now seen corresponding path program 1 times [2019-11-15 20:08:33,362 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:08:33,362 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353666418] [2019-11-15 20:08:33,363 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:33,363 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:33,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:08:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:33,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353666418] [2019-11-15 20:08:33,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174000415] [2019-11-15 20:08:33,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:08:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:33,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 20:08:33,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:08:33,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 20:08:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:33,618 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:08:33,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-15 20:08:33,619 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901534404] [2019-11-15 20:08:33,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 20:08:33,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:08:33,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 20:08:33,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-15 20:08:33,620 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 8 states. [2019-11-15 20:08:33,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:33,815 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2019-11-15 20:08:33,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 20:08:33,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-15 20:08:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:33,817 INFO L225 Difference]: With dead ends: 81 [2019-11-15 20:08:33,817 INFO L226 Difference]: Without dead ends: 60 [2019-11-15 20:08:33,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-15 20:08:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-15 20:08:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2019-11-15 20:08:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 20:08:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-11-15 20:08:33,827 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 21 [2019-11-15 20:08:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:33,827 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-11-15 20:08:33,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 20:08:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-11-15 20:08:33,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 20:08:33,829 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:33,829 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:34,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:08:34,036 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash 956146768, now seen corresponding path program 1 times [2019-11-15 20:08:34,037 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:08:34,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102999410] [2019-11-15 20:08:34,037 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:34,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:34,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:08:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 20:08:34,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102999410] [2019-11-15 20:08:34,140 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:08:34,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 20:08:34,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712921052] [2019-11-15 20:08:34,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 20:08:34,141 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:08:34,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 20:08:34,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 20:08:34,142 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 3 states. [2019-11-15 20:08:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:34,169 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-11-15 20:08:34,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 20:08:34,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-11-15 20:08:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:34,173 INFO L225 Difference]: With dead ends: 59 [2019-11-15 20:08:34,173 INFO L226 Difference]: Without dead ends: 38 [2019-11-15 20:08:34,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 20:08:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-15 20:08:34,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-15 20:08:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 20:08:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-15 20:08:34,179 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 33 [2019-11-15 20:08:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:34,180 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-15 20:08:34,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 20:08:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-15 20:08:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 20:08:34,181 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:34,181 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:34,181 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1977215122, now seen corresponding path program 1 times [2019-11-15 20:08:34,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:08:34,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323337785] [2019-11-15 20:08:34,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:34,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:34,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:08:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 20:08:34,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323337785] [2019-11-15 20:08:34,250 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:08:34,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 20:08:34,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156754047] [2019-11-15 20:08:34,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 20:08:34,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:08:34,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 20:08:34,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 20:08:34,251 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 3 states. [2019-11-15 20:08:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:34,269 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-11-15 20:08:34,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 20:08:34,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-11-15 20:08:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:34,271 INFO L225 Difference]: With dead ends: 53 [2019-11-15 20:08:34,271 INFO L226 Difference]: Without dead ends: 38 [2019-11-15 20:08:34,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 20:08:34,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-15 20:08:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-15 20:08:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 20:08:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-15 20:08:34,278 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 33 [2019-11-15 20:08:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:34,278 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-15 20:08:34,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 20:08:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-15 20:08:34,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 20:08:34,280 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:34,280 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:34,280 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1584188112, now seen corresponding path program 1 times [2019-11-15 20:08:34,281 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:08:34,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794048544] [2019-11-15 20:08:34,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:34,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:08:34,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:08:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:35,187 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2019-11-15 20:08:35,364 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2019-11-15 20:08:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:35,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794048544] [2019-11-15 20:08:35,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039479046] [2019-11-15 20:08:35,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:08:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:36,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-15 20:08:36,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:08:36,111 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2019-11-15 20:08:36,112 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 20:08:36,127 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 20:08:36,128 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 20:08:36,128 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-11-15 20:08:36,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:08:36,372 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$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.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) 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.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-11-15 20:08:36,375 INFO L168 Benchmark]: Toolchain (without parser) took 4727.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 943.4 MB in the beginning and 1.0 GB in the end (delta: -63.9 MB). Peak memory consumption was 71.9 MB. Max. memory is 11.5 GB. [2019-11-15 20:08:36,376 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:08:36,377 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -187.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-15 20:08:36,377 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.09 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-15 20:08:36,377 INFO L168 Benchmark]: Boogie Preprocessor took 30.50 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. [2019-11-15 20:08:36,378 INFO L168 Benchmark]: RCFGBuilder took 416.36 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: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-11-15 20:08:36,379 INFO L168 Benchmark]: TraceAbstraction took 3851.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 88.9 MB). Peak memory consumption was 88.9 MB. Max. memory is 11.5 GB. [2019-11-15 20:08:36,381 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 377.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -187.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 48.09 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.50 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 416.36 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: 29.1 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3851.13 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 88.9 MB). Peak memory consumption was 88.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.NullPointerException de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.NullPointerException: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-11-15 20:08:38,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 20:08:38,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 20:08:38,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 20:08:38,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 20:08:38,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 20:08:38,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 20:08:38,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 20:08:38,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 20:08:38,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 20:08:38,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 20:08:38,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 20:08:38,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 20:08:38,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 20:08:38,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 20:08:38,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 20:08:38,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 20:08:38,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 20:08:38,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 20:08:38,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 20:08:38,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 20:08:38,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 20:08:38,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 20:08:38,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 20:08:38,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 20:08:38,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 20:08:38,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 20:08:38,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 20:08:38,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 20:08:38,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 20:08:38,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 20:08:38,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 20:08:38,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 20:08:38,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 20:08:38,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 20:08:38,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 20:08:38,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 20:08:38,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 20:08:38,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 20:08:38,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 20:08:38,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 20:08:38,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-15 20:08:38,670 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 20:08:38,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 20:08:38,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 20:08:38,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 20:08:38,672 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 20:08:38,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 20:08:38,676 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 20:08:38,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 20:08:38,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 20:08:38,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 20:08:38,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 20:08:38,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 20:08:38,678 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 20:08:38,678 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 20:08:38,679 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 20:08:38,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 20:08:38,679 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 20:08:38,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 20:08:38,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 20:08:38,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 20:08:38,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 20:08:38,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 20:08:38,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 20:08:38,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 20:08:38,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 20:08:38,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 20:08:38,683 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 20:08:38,684 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 20:08:38,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 20:08:38,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 20:08:38,684 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer 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 -> Automizer 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 -> 162af48526beed8ce59715aaad1198a79a3197bf [2019-11-15 20:08:38,716 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 20:08:38,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 20:08:38,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 20:08:38,733 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 20:08:38,733 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 20:08:38,734 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/../../sv-benchmarks/c/array-tiling/mbpr4.c [2019-11-15 20:08:38,791 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data/57f3b73d2/2db80bfa5581482f9541dedc51f9fc7f/FLAG8004e97ae [2019-11-15 20:08:39,208 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 20:08:39,208 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/sv-benchmarks/c/array-tiling/mbpr4.c [2019-11-15 20:08:39,216 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data/57f3b73d2/2db80bfa5581482f9541dedc51f9fc7f/FLAG8004e97ae [2019-11-15 20:08:39,583 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/data/57f3b73d2/2db80bfa5581482f9541dedc51f9fc7f [2019-11-15 20:08:39,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 20:08:39,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 20:08:39,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 20:08:39,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 20:08:39,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 20:08:39,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:08:39" (1/1) ... [2019-11-15 20:08:39,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44085069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:39, skipping insertion in model container [2019-11-15 20:08:39,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:08:39" (1/1) ... [2019-11-15 20:08:39,603 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 20:08:39,632 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 20:08:39,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:08:39,844 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 20:08:39,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:08:40,036 INFO L192 MainTranslator]: Completed translation [2019-11-15 20:08:40,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40 WrapperNode [2019-11-15 20:08:40,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 20:08:40,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 20:08:40,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 20:08:40,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 20:08:40,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... [2019-11-15 20:08:40,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... [2019-11-15 20:08:40,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 20:08:40,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 20:08:40,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 20:08:40,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 20:08:40,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... [2019-11-15 20:08:40,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... [2019-11-15 20:08:40,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... [2019-11-15 20:08:40,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... [2019-11-15 20:08:40,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... [2019-11-15 20:08:40,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... [2019-11-15 20:08:40,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... [2019-11-15 20:08:40,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 20:08:40,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 20:08:40,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 20:08:40,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 20:08:40,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/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 [2019-11-15 20:08:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-15 20:08:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 20:08:40,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 20:08:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 20:08:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-15 20:08:40,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 20:08:40,735 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 20:08:40,735 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-15 20:08:40,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:08:40 BoogieIcfgContainer [2019-11-15 20:08:40,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 20:08:40,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 20:08:40,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 20:08:40,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 20:08:40,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 08:08:39" (1/3) ... [2019-11-15 20:08:40,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51150a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:08:40, skipping insertion in model container [2019-11-15 20:08:40,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:08:40" (2/3) ... [2019-11-15 20:08:40,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51150a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:08:40, skipping insertion in model container [2019-11-15 20:08:40,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:08:40" (3/3) ... [2019-11-15 20:08:40,745 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr4.c [2019-11-15 20:08:40,753 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 20:08:40,759 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 20:08:40,770 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 20:08:40,793 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 20:08:40,793 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 20:08:40,793 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 20:08:40,793 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 20:08:40,794 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 20:08:40,794 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 20:08:40,794 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 20:08:40,794 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 20:08:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-11-15 20:08:40,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 20:08:40,812 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:40,813 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:40,815 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:40,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:40,819 INFO L82 PathProgramCache]: Analyzing trace with hash 219549199, now seen corresponding path program 1 times [2019-11-15 20:08:40,827 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 20:08:40,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2075160271] [2019-11-15 20:08:40,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:08:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:40,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-15 20:08:40,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:08:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:40,933 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 20:08:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:40,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2075160271] [2019-11-15 20:08:40,939 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:08:40,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-15 20:08:40,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938166128] [2019-11-15 20:08:40,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 20:08:40,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 20:08:40,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 20:08:40,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 20:08:40,960 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-11-15 20:08:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:40,977 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2019-11-15 20:08:40,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 20:08:40,978 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-15 20:08:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:40,989 INFO L225 Difference]: With dead ends: 66 [2019-11-15 20:08:40,989 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 20:08:40,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 20:08:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 20:08:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-15 20:08:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-15 20:08:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-11-15 20:08:41,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2019-11-15 20:08:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:41,027 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-11-15 20:08:41,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 20:08:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-11-15 20:08:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 20:08:41,029 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:41,029 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:41,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:08:41,239 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:41,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1179538664, now seen corresponding path program 1 times [2019-11-15 20:08:41,240 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 20:08:41,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [453605184] [2019-11-15 20:08:41,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:08:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:41,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 20:08:41,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:08:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:41,330 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 20:08:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:41,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [453605184] [2019-11-15 20:08:41,349 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:08:41,349 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-11-15 20:08:41,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985375531] [2019-11-15 20:08:41,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 20:08:41,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 20:08:41,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 20:08:41,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 20:08:41,352 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 5 states. [2019-11-15 20:08:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:41,445 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-11-15 20:08:41,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 20:08:41,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-15 20:08:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:41,447 INFO L225 Difference]: With dead ends: 46 [2019-11-15 20:08:41,447 INFO L226 Difference]: Without dead ends: 44 [2019-11-15 20:08:41,448 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-15 20:08:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-15 20:08:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2019-11-15 20:08:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-15 20:08:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-11-15 20:08:41,454 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2019-11-15 20:08:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:41,455 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-11-15 20:08:41,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 20:08:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-11-15 20:08:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 20:08:41,456 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:41,456 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:41,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:08:41,661 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1179598246, now seen corresponding path program 1 times [2019-11-15 20:08:41,662 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 20:08:41,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1289366714] [2019-11-15 20:08:41,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:08:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:41,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 20:08:41,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:08:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:41,805 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 20:08:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:42,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289366714] [2019-11-15 20:08:42,147 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:08:42,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 20:08:42,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776951688] [2019-11-15 20:08:42,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 20:08:42,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 20:08:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 20:08:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-15 20:08:42,148 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 6 states. [2019-11-15 20:08:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:43,133 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2019-11-15 20:08:43,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 20:08:43,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-15 20:08:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:43,139 INFO L225 Difference]: With dead ends: 74 [2019-11-15 20:08:43,139 INFO L226 Difference]: Without dead ends: 48 [2019-11-15 20:08:43,140 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-15 20:08:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-15 20:08:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2019-11-15 20:08:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-15 20:08:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-15 20:08:43,146 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2019-11-15 20:08:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:43,146 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-15 20:08:43,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 20:08:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-15 20:08:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 20:08:43,147 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:43,147 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:43,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:08:43,348 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:43,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:43,348 INFO L82 PathProgramCache]: Analyzing trace with hash -130988767, now seen corresponding path program 1 times [2019-11-15 20:08:43,349 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 20:08:43,349 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2074656259] [2019-11-15 20:08:43,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:08:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:43,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 20:08:43,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:08:43,645 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2019-11-15 20:08:43,849 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-11-15 20:08:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:44,310 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 20:08:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:08:45,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074656259] [2019-11-15 20:08:45,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:08:45,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-15 20:08:45,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670363749] [2019-11-15 20:08:45,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 20:08:45,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 20:08:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 20:08:45,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-15 20:08:45,630 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 12 states. [2019-11-15 20:08:46,238 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2019-11-15 20:08:46,539 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2019-11-15 20:08:47,228 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-11-15 20:08:47,841 WARN L191 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-11-15 20:08:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:08:59,613 INFO L93 Difference]: Finished difference Result 156 states and 207 transitions. [2019-11-15 20:08:59,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 20:08:59,619 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-11-15 20:08:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:08:59,621 INFO L225 Difference]: With dead ends: 156 [2019-11-15 20:08:59,621 INFO L226 Difference]: Without dead ends: 131 [2019-11-15 20:08:59,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-11-15 20:08:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-15 20:08:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 68. [2019-11-15 20:08:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-15 20:08:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2019-11-15 20:08:59,638 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 21 [2019-11-15 20:08:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:08:59,638 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2019-11-15 20:08:59,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 20:08:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2019-11-15 20:08:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 20:08:59,640 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:08:59,640 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:08:59,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:08:59,841 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:08:59,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:08:59,842 INFO L82 PathProgramCache]: Analyzing trace with hash 956146768, now seen corresponding path program 1 times [2019-11-15 20:08:59,842 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 20:08:59,843 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [144387413] [2019-11-15 20:08:59,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:08:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:08:59,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 20:08:59,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:09:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 20:09:00,019 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 20:09:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 20:09:00,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [144387413] [2019-11-15 20:09:00,041 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:09:00,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 20:09:00,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330592590] [2019-11-15 20:09:00,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 20:09:00,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 20:09:00,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 20:09:00,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:09:00,045 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 4 states. [2019-11-15 20:09:00,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:09:00,112 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2019-11-15 20:09:00,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 20:09:00,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-11-15 20:09:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:09:00,118 INFO L225 Difference]: With dead ends: 101 [2019-11-15 20:09:00,118 INFO L226 Difference]: Without dead ends: 68 [2019-11-15 20:09:00,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:09:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-15 20:09:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-15 20:09:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-15 20:09:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2019-11-15 20:09:00,135 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 33 [2019-11-15 20:09:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:09:00,136 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2019-11-15 20:09:00,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 20:09:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2019-11-15 20:09:00,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 20:09:00,137 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:09:00,137 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:09:00,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:09:00,338 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:09:00,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:09:00,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1977215122, now seen corresponding path program 1 times [2019-11-15 20:09:00,339 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 20:09:00,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [942629576] [2019-11-15 20:09:00,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:09:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:09:00,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 20:09:00,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:09:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 20:09:00,476 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 20:09:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-15 20:09:00,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [942629576] [2019-11-15 20:09:00,498 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:09:00,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 20:09:00,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712695534] [2019-11-15 20:09:00,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 20:09:00,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 20:09:00,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 20:09:00,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:09:00,500 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 4 states. [2019-11-15 20:09:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:09:00,551 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2019-11-15 20:09:00,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 20:09:00,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-11-15 20:09:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:09:00,553 INFO L225 Difference]: With dead ends: 86 [2019-11-15 20:09:00,554 INFO L226 Difference]: Without dead ends: 68 [2019-11-15 20:09:00,554 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:09:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-15 20:09:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-15 20:09:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-15 20:09:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2019-11-15 20:09:00,576 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 33 [2019-11-15 20:09:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:09:00,577 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2019-11-15 20:09:00,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 20:09:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2019-11-15 20:09:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 20:09:00,578 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:09:00,579 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:09:00,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:09:00,780 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:09:00,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:09:00,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1584188112, now seen corresponding path program 1 times [2019-11-15 20:09:00,781 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 20:09:00,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1415999914] [2019-11-15 20:09:00,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ea17a06d-2896-4575-86f5-f2d88fb11f73/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:09:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:09:00,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-15 20:09:00,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:09:00,986 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2019-11-15 20:09:00,996 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 20:09:01,012 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 20:09:01,012 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 20:09:01,012 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-15 20:09:01,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 20:09:01,239 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$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.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) 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.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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) [2019-11-15 20:09:01,243 INFO L168 Benchmark]: Toolchain (without parser) took 21656.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 952.4 MB in the beginning and 877.4 MB in the end (delta: 75.0 MB). Peak memory consumption was 238.5 MB. Max. memory is 11.5 GB. [2019-11-15 20:09:01,244 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:09:01,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 448.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 952.4 MB in the beginning and 1.2 GB in the end (delta: -198.7 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB. [2019-11-15 20:09:01,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:09:01,245 INFO L168 Benchmark]: Boogie Preprocessor took 52.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:09:01,246 INFO L168 Benchmark]: RCFGBuilder took 602.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2019-11-15 20:09:01,246 INFO L168 Benchmark]: TraceAbstraction took 20503.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 877.4 MB in the end (delta: 242.3 MB). Peak memory consumption was 242.3 MB. Max. memory is 11.5 GB. [2019-11-15 20:09:01,249 INFO L335 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 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 448.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 952.4 MB in the beginning and 1.2 GB in the end (delta: -198.7 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 45.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 52.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 602.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 20503.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 877.4 MB in the end (delta: 242.3 MB). Peak memory consumption was 242.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.MultiDimensionalNestedStore.getInnermost(MultiDimensionalNestedStore.java:121) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...