./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr5.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/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr5.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 294ce98a2da4619fc118327a9f377eca99a10a1c ......................................................................................................................................................................................................................................................................................................................................................................................................................................... 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/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr5.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 294ce98a2da4619fc118327a9f377eca99a10a1c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2019-10-22 08:58:46,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:58:46,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:58:46,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:58:46,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:58:46,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:58:46,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:58:46,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:58:46,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:58:46,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:58:46,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:58:46,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:58:46,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:58:46,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:58:46,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:58:46,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:58:46,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:58:46,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:58:46,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:58:46,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:58:46,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:58:46,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:58:46,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:58:46,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:58:46,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:58:46,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:58:46,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:58:46,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:58:46,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:58:46,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:58:46,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:58:46,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:58:46,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:58:46,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:58:46,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:58:46,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:58:46,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:58:46,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:58:46,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:58:46,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:58:46,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:58:46,821 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:58:46,834 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:58:46,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:58:46,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:58:46,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:58:46,836 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:58:46,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:58:46,836 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:58:46,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:58:46,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:58:46,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:58:46,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:58:46,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:58:46,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:58:46,837 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:58:46,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:58:46,837 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:58:46,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:58:46,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:58:46,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:58:46,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:58:46,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:58:46,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:58:46,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:58:46,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:58:46,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:58:46,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:58:46,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:58:46,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:58:46,847 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/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 -> 294ce98a2da4619fc118327a9f377eca99a10a1c [2019-10-22 08:58:46,878 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:58:46,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:58:46,894 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:58:46,895 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:58:46,895 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:58:46,897 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/../../sv-benchmarks/c/array-tiling/mbpr5.c [2019-10-22 08:58:46,955 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data/dd0731400/98b49539d4174f9e8cd95f34b5184463/FLAGe2900005d [2019-10-22 08:58:47,373 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:58:47,381 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/sv-benchmarks/c/array-tiling/mbpr5.c [2019-10-22 08:58:47,390 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data/dd0731400/98b49539d4174f9e8cd95f34b5184463/FLAGe2900005d [2019-10-22 08:58:47,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data/dd0731400/98b49539d4174f9e8cd95f34b5184463 [2019-10-22 08:58:47,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:58:47,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:58:47,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:47,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:58:47,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:58:47,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:47" (1/1) ... [2019-10-22 08:58:47,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7a02dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:47, skipping insertion in model container [2019-10-22 08:58:47,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:47" (1/1) ... [2019-10-22 08:58:47,764 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:58:47,784 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:58:48,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:48,045 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:58:48,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:48,106 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:58:48,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48 WrapperNode [2019-10-22 08:58:48,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:48,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:48,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:58:48,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:58:48,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... [2019-10-22 08:58:48,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... [2019-10-22 08:58:48,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:48,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:58:48,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:58:48,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:58:48,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... [2019-10-22 08:58:48,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... [2019-10-22 08:58:48,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... [2019-10-22 08:58:48,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... [2019-10-22 08:58:48,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... [2019-10-22 08:58:48,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... [2019-10-22 08:58:48,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... [2019-10-22 08:58:48,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:58:48,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:58:48,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:58:48,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:58:48,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 [2019-10-22 08:58:48,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 08:58:48,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:58:48,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:58:48,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:58:48,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:58:48,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:58:48,665 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:58:48,665 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-22 08:58:48,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:48 BoogieIcfgContainer [2019-10-22 08:58:48,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:58:48,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:58:48,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:58:48,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:58:48,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:58:47" (1/3) ... [2019-10-22 08:58:48,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e01e33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:48, skipping insertion in model container [2019-10-22 08:58:48,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:48" (2/3) ... [2019-10-22 08:58:48,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e01e33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:48, skipping insertion in model container [2019-10-22 08:58:48,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:48" (3/3) ... [2019-10-22 08:58:48,684 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2019-10-22 08:58:48,691 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:58:48,699 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:58:48,707 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:58:48,730 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:58:48,730 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:58:48,730 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:58:48,730 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:58:48,730 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:58:48,730 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:58:48,731 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:58:48,731 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:58:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-10-22 08:58:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:58:48,750 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:48,750 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:48,752 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:48,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2005705728, now seen corresponding path program 1 times [2019-10-22 08:58:48,761 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:48,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756659308] [2019-10-22 08:58:48,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:48,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:48,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:48,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756659308] [2019-10-22 08:58:48,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:58:48,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:58:48,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328839998] [2019-10-22 08:58:48,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:58:48,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:48,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:58:48,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:58:48,904 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2019-10-22 08:58:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:48,921 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2019-10-22 08:58:48,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:58:48,923 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-10-22 08:58:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:48,931 INFO L225 Difference]: With dead ends: 76 [2019-10-22 08:58:48,931 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 08:58:48,934 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 [2019-10-22 08:58:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 08:58:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-22 08:58:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-22 08:58:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-10-22 08:58:48,966 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 19 [2019-10-22 08:58:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:48,967 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-10-22 08:58:48,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:58:48,967 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-10-22 08:58:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:58:48,968 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:48,968 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:48,968 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1810000308, now seen corresponding path program 1 times [2019-10-22 08:58:48,969 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:48,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293098523] [2019-10-22 08:58:48,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:48,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:48,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:49,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293098523] [2019-10-22 08:58:49,333 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:58:49,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 08:58:49,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419845166] [2019-10-22 08:58:49,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:58:49,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:49,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:58:49,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:58:49,336 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2019-10-22 08:58:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:49,569 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2019-10-22 08:58:49,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:58:49,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-10-22 08:58:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:49,571 INFO L225 Difference]: With dead ends: 86 [2019-10-22 08:58:49,571 INFO L226 Difference]: Without dead ends: 57 [2019-10-22 08:58:49,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:58:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-22 08:58:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2019-10-22 08:58:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 08:58:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-22 08:58:49,581 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 19 [2019-10-22 08:58:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:49,581 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-22 08:58:49,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:58:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-22 08:58:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:58:49,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:49,582 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, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:49,582 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1666752049, now seen corresponding path program 1 times [2019-10-22 08:58:49,583 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:49,583 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217219076] [2019-10-22 08:58:49,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:49,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:49,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:58:49,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217219076] [2019-10-22 08:58:49,703 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:58:49,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:58:49,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402248494] [2019-10-22 08:58:49,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:58:49,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:49,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:58:49,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:58:49,705 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 3 states. [2019-10-22 08:58:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:49,741 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2019-10-22 08:58:49,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:58:49,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-22 08:58:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:49,743 INFO L225 Difference]: With dead ends: 67 [2019-10-22 08:58:49,743 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 08:58:49,743 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 [2019-10-22 08:58:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 08:58:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-22 08:58:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 08:58:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-10-22 08:58:49,756 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-10-22 08:58:49,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:49,756 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-10-22 08:58:49,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:58:49,756 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-10-22 08:58:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:58:49,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:49,757 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, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:49,758 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:49,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1447897331, now seen corresponding path program 1 times [2019-10-22 08:58:49,759 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:49,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331366172] [2019-10-22 08:58:49,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:49,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:49,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:58:49,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331366172] [2019-10-22 08:58:49,863 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:58:49,863 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:58:49,863 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125463402] [2019-10-22 08:58:49,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:58:49,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:58:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:58:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:58:49,865 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 3 states. [2019-10-22 08:58:49,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:49,887 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2019-10-22 08:58:49,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:58:49,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-22 08:58:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:49,889 INFO L225 Difference]: With dead ends: 55 [2019-10-22 08:58:49,889 INFO L226 Difference]: Without dead ends: 42 [2019-10-22 08:58:49,889 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 [2019-10-22 08:58:49,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-22 08:58:49,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-22 08:58:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-22 08:58:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-10-22 08:58:49,896 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 39 [2019-10-22 08:58:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:49,896 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-10-22 08:58:49,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:58:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-10-22 08:58:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:58:49,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:49,898 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, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:49,898 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:49,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1054870321, now seen corresponding path program 1 times [2019-10-22 08:58:49,899 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:58:49,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111758142] [2019-10-22 08:58:49,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:49,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:58:49,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:58:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:50,675 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 34 [2019-10-22 08:58:50,920 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 40 [2019-10-22 08:58:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:58:51,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111758142] [2019-10-22 08:58:51,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970851566] [2019-10-22 08:58:51,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 [2019-10-22 08:58:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:52,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-22 08:58:52,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:52,144 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 [2019-10-22 08:58:52,146 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:58:52,154 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:58:52,155 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 08:58:52,155 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2019-10-22 08:58:52,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:58:52,393 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 [2019-10-22 08:58:52,398 INFO L168 Benchmark]: Toolchain (without parser) took 4650.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.9 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -111.9 MB). Peak memory consumption was 79.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:52,398 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:58:52,399 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.22 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.1 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -157.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:52,399 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:52,400 INFO L168 Benchmark]: Boogie Preprocessor took 65.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:52,400 INFO L168 Benchmark]: RCFGBuilder took 421.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:52,401 INFO L168 Benchmark]: TraceAbstraction took 3727.76 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 80.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.8 MB). Peak memory consumption was 92.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:58:52,404 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 358.22 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.1 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -157.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 71.56 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 65.51 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 421.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 30.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3727.76 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 80.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 11.8 MB). Peak memory consumption was 92.5 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 [2019-10-22 08:58:54,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:58:54,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:58:54,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:58:54,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:58:54,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:58:54,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:58:54,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:58:54,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:58:54,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:58:54,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:58:54,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:58:54,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:58:54,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:58:54,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:58:54,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:58:54,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:58:54,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:58:54,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:58:54,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:58:54,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:58:54,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:58:54,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:58:54,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:58:54,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:58:54,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:58:54,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:58:54,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:58:54,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:58:54,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:58:54,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:58:54,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:58:54,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:58:54,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:58:54,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:58:54,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:58:54,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:58:54,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:58:54,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:58:54,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:58:54,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:58:54,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-10-22 08:58:54,491 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:58:54,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:58:54,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:58:54,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:58:54,492 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:58:54,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:58:54,493 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:58:54,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:58:54,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:58:54,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:58:54,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:58:54,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:58:54,493 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 08:58:54,495 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 08:58:54,495 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:58:54,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:58:54,495 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:58:54,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:58:54,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:58:54,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:58:54,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:58:54,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:58:54,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:58:54,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:58:54,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:58:54,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:58:54,496 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-10-22 08:58:54,497 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 08:58:54,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:58:54,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 08:58:54,497 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/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 -> 294ce98a2da4619fc118327a9f377eca99a10a1c [2019-10-22 08:58:54,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:58:54,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:58:54,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:58:54,549 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:58:54,550 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:58:54,550 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/../../sv-benchmarks/c/array-tiling/mbpr5.c [2019-10-22 08:58:54,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data/547c25dc2/0f410f82478a45c1a6bdb35acd9ce843/FLAG7f36751c2 [2019-10-22 08:58:54,997 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:58:54,998 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/sv-benchmarks/c/array-tiling/mbpr5.c [2019-10-22 08:58:55,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data/547c25dc2/0f410f82478a45c1a6bdb35acd9ce843/FLAG7f36751c2 [2019-10-22 08:58:55,014 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/bin/uautomizer/data/547c25dc2/0f410f82478a45c1a6bdb35acd9ce843 [2019-10-22 08:58:55,016 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:58:55,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:58:55,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:55,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:58:55,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:58:55,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313b155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55, skipping insertion in model container [2019-10-22 08:58:55,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,030 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:58:55,049 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:58:55,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:55,239 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:58:55,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:58:55,364 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:58:55,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55 WrapperNode [2019-10-22 08:58:55,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:58:55,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:55,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:58:55,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:58:55,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,417 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:58:55,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:58:55,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:58:55,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:58:55,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... [2019-10-22 08:58:55,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:58:55,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:58:55,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:58:55,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:58:55,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 [2019-10-22 08:58:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 08:58:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:58:55,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:58:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:58:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 08:58:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:58:56,061 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:58:56,061 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-22 08:58:56,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:56 BoogieIcfgContainer [2019-10-22 08:58:56,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:58:56,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:58:56,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:58:56,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:58:56,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:58:55" (1/3) ... [2019-10-22 08:58:56,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5136488c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:56, skipping insertion in model container [2019-10-22 08:58:56,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:58:55" (2/3) ... [2019-10-22 08:58:56,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5136488c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:58:56, skipping insertion in model container [2019-10-22 08:58:56,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:58:56" (3/3) ... [2019-10-22 08:58:56,070 INFO L109 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2019-10-22 08:58:56,076 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:58:56,082 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:58:56,092 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:58:56,113 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:58:56,113 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:58:56,113 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:58:56,113 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:58:56,113 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:58:56,114 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:58:56,114 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:58:56,114 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:58:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-10-22 08:58:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:58:56,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:56,133 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:56,134 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:56,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2005705728, now seen corresponding path program 1 times [2019-10-22 08:58:56,148 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:58:56,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [634509552] [2019-10-22 08:58:56,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 [2019-10-22 08:58:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:56,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 08:58:56,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:56,247 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:58:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:56,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634509552] [2019-10-22 08:58:56,252 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:58:56,252 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 08:58:56,252 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856186483] [2019-10-22 08:58:56,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:58:56,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:58:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:58:56,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:58:56,271 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2019-10-22 08:58:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:56,288 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2019-10-22 08:58:56,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:58:56,290 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-10-22 08:58:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:56,298 INFO L225 Difference]: With dead ends: 76 [2019-10-22 08:58:56,298 INFO L226 Difference]: Without dead ends: 37 [2019-10-22 08:58:56,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:58:56,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-22 08:58:56,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-22 08:58:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-22 08:58:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-10-22 08:58:56,330 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 19 [2019-10-22 08:58:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:56,330 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-10-22 08:58:56,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:58:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-10-22 08:58:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 08:58:56,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:56,331 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:58:56,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:58:56,532 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:56,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1810000308, now seen corresponding path program 1 times [2019-10-22 08:58:56,533 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:58:56,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1028840307] [2019-10-22 08:58:56,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 [2019-10-22 08:58:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:56,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 08:58:56,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:56,939 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2019-10-22 08:58:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:56,969 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:58:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:57,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028840307] [2019-10-22 08:58:57,261 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:58:57,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:58:57,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828851223] [2019-10-22 08:58:57,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:58:57,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:58:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:58:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:58:57,264 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 6 states. [2019-10-22 08:58:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:58:58,262 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2019-10-22 08:58:58,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:58:58,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-22 08:58:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:58:58,268 INFO L225 Difference]: With dead ends: 78 [2019-10-22 08:58:58,268 INFO L226 Difference]: Without dead ends: 49 [2019-10-22 08:58:58,269 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:58:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-22 08:58:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2019-10-22 08:58:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-22 08:58:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2019-10-22 08:58:58,275 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2019-10-22 08:58:58,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:58:58,276 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2019-10-22 08:58:58,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:58:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2019-10-22 08:58:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 08:58:58,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:58:58,277 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] [2019-10-22 08:58:58,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:58:58,478 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:58:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:58:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1436265223, now seen corresponding path program 1 times [2019-10-22 08:58:58,479 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:58:58,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [715597929] [2019-10-22 08:58:58,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 [2019-10-22 08:58:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:58:58,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:58:58,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:58:59,234 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2019-10-22 08:58:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:58:59,237 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:00,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715597929] [2019-10-22 08:59:00,338 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:00,339 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-10-22 08:59:00,339 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595789668] [2019-10-22 08:59:00,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 08:59:00,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:00,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 08:59:00,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:59:00,340 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand 12 states. [2019-10-22 08:59:00,958 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2019-10-22 08:59:01,477 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-10-22 08:59:01,940 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-10-22 08:59:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:15,506 INFO L93 Difference]: Finished difference Result 174 states and 238 transitions. [2019-10-22 08:59:15,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 08:59:15,511 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-10-22 08:59:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:15,512 INFO L225 Difference]: With dead ends: 174 [2019-10-22 08:59:15,512 INFO L226 Difference]: Without dead ends: 146 [2019-10-22 08:59:15,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:59:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-22 08:59:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 82. [2019-10-22 08:59:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-22 08:59:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2019-10-22 08:59:15,525 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 23 [2019-10-22 08:59:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:15,526 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2019-10-22 08:59:15,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 08:59:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2019-10-22 08:59:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:59:15,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:15,527 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, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:15,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:59:15,728 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1666752049, now seen corresponding path program 1 times [2019-10-22 08:59:15,729 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:15,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [453388344] [2019-10-22 08:59:15,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 [2019-10-22 08:59:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:15,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:59:15,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:59:15,937 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:59:15,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [453388344] [2019-10-22 08:59:15,957 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:15,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 08:59:15,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346313367] [2019-10-22 08:59:15,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:59:15,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:15,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:59:15,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:59:15,959 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand 4 states. [2019-10-22 08:59:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:16,010 INFO L93 Difference]: Finished difference Result 129 states and 164 transitions. [2019-10-22 08:59:16,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:59:16,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-10-22 08:59:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:16,011 INFO L225 Difference]: With dead ends: 129 [2019-10-22 08:59:16,012 INFO L226 Difference]: Without dead ends: 82 [2019-10-22 08:59:16,012 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:59:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-22 08:59:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-10-22 08:59:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-22 08:59:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2019-10-22 08:59:16,023 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 39 [2019-10-22 08:59:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:16,024 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2019-10-22 08:59:16,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:59:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2019-10-22 08:59:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:59:16,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:16,025 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, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:16,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:59:16,226 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:16,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1447897331, now seen corresponding path program 1 times [2019-10-22 08:59:16,227 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:16,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [304883758] [2019-10-22 08:59:16,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 [2019-10-22 08:59:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:16,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:59:16,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:59:16,414 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:59:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:59:16,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304883758] [2019-10-22 08:59:16,436 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:16,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 08:59:16,436 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387550386] [2019-10-22 08:59:16,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:59:16,437 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:59:16,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:59:16,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:59:16,437 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand 4 states. [2019-10-22 08:59:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:16,478 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2019-10-22 08:59:16,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:59:16,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-10-22 08:59:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:16,480 INFO L225 Difference]: With dead ends: 98 [2019-10-22 08:59:16,480 INFO L226 Difference]: Without dead ends: 82 [2019-10-22 08:59:16,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:59:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-22 08:59:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-10-22 08:59:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-22 08:59:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2019-10-22 08:59:16,489 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 39 [2019-10-22 08:59:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:16,490 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2019-10-22 08:59:16,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:59:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2019-10-22 08:59:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-22 08:59:16,491 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:16,491 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, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:16,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:59:16,692 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:16,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1054870321, now seen corresponding path program 1 times [2019-10-22 08:59:16,692 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:59:16,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2089315060] [2019-10-22 08:59:16,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b14db842-e0c8-4ad6-9b02-7b49019d63c6/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 [2019-10-22 08:59:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:17,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 08:59:17,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:17,069 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 [2019-10-22 08:59:17,069 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-22 08:59:17,083 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-22 08:59:17,084 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-22 08:59:17,084 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-22 08:59:17,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 08:59:17,310 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) [2019-10-22 08:59:17,315 INFO L168 Benchmark]: Toolchain (without parser) took 22298.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 952.3 MB in the beginning and 872.7 MB in the end (delta: 79.7 MB). Peak memory consumption was 242.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,316 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:17,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 952.3 MB in the beginning and 1.2 GB in the end (delta: -205.3 MB). Peak memory consumption was 29.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,317 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,318 INFO L168 Benchmark]: Boogie Preprocessor took 34.50 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. [2019-10-22 08:59:17,318 INFO L168 Benchmark]: RCFGBuilder took 611.65 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: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,319 INFO L168 Benchmark]: TraceAbstraction took 21249.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 872.7 MB in the end (delta: 245.2 MB). Peak memory consumption was 245.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:17,321 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 347.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 952.3 MB in the beginning and 1.2 GB in the end (delta: -205.3 MB). Peak memory consumption was 29.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 52.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 34.50 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 611.65 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: 33.3 MB). Peak memory consumption was 33.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 21249.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 872.7 MB in the end (delta: 245.2 MB). Peak memory consumption was 245.2 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...