./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/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 1142409cf6d95759e551b0a166d386d83f24e4ed ............................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/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 1142409cf6d95759e551b0a166d386d83f24e4ed ............................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 22:25:49,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:25:49,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:25:50,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:25:50,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:25:50,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:25:50,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:25:50,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:25:50,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:25:50,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:25:50,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:25:50,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:25:50,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:25:50,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:25:50,015 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:25:50,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:25:50,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:25:50,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:25:50,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:25:50,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:25:50,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:25:50,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:25:50,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:25:50,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:25:50,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:25:50,026 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:25:50,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:25:50,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:25:50,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:25:50,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:25:50,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:25:50,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:25:50,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:25:50,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:25:50,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:25:50,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:25:50,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:25:50,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:25:50,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:25:50,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:25:50,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:25:50,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 22:25:50,047 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:25:50,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:25:50,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:25:50,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:25:50,049 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:25:50,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:25:50,049 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:25:50,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:25:50,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:25:50,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:25:50,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:25:50,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:25:50,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:25:50,053 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:25:50,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:25:50,054 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:25:50,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:25:50,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:25:50,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:25:50,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:25:50,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:25:50,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:25:50,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:25:50,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:25:50,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:25:50,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:25:50,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:25:50,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:25:50,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/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 -> 1142409cf6d95759e551b0a166d386d83f24e4ed [2019-11-15 22:25:50,099 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:25:50,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:25:50,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:25:50,112 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:25:50,113 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:25:50,113 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2019-11-15 22:25:50,170 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data/e602333bc/e966f039933d46a3b15603ceecd111a3/FLAG961b1c31e [2019-11-15 22:25:50,553 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:25:50,554 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/sv-benchmarks/c/verifythis/prefixsum_rec.c [2019-11-15 22:25:50,560 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data/e602333bc/e966f039933d46a3b15603ceecd111a3/FLAG961b1c31e [2019-11-15 22:25:50,975 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data/e602333bc/e966f039933d46a3b15603ceecd111a3 [2019-11-15 22:25:50,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:25:50,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:25:50,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:25:50,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:25:50,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:25:50,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:25:50" (1/1) ... [2019-11-15 22:25:50,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f4a701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:50, skipping insertion in model container [2019-11-15 22:25:50,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:25:50" (1/1) ... [2019-11-15 22:25:50,999 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:25:51,022 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:25:51,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:25:51,236 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:25:51,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:25:51,274 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:25:51,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51 WrapperNode [2019-11-15 22:25:51,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:25:51,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:25:51,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:25:51,276 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:25:51,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... [2019-11-15 22:25:51,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... [2019-11-15 22:25:51,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:25:51,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:25:51,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:25:51,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:25:51,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... [2019-11-15 22:25:51,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... [2019-11-15 22:25:51,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... [2019-11-15 22:25:51,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... [2019-11-15 22:25:51,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... [2019-11-15 22:25:51,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... [2019-11-15 22:25:51,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... [2019-11-15 22:25:51,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:25:51,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:25:51,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:25:51,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:25:51,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:25:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2019-11-15 22:25:51,410 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2019-11-15 22:25:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 22:25:51,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 22:25:51,411 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2019-11-15 22:25:51,411 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2019-11-15 22:25:51,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:25:51,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:25:51,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 22:25:51,754 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:25:51,755 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-15 22:25:51,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:25:51 BoogieIcfgContainer [2019-11-15 22:25:51,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:25:51,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:25:51,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:25:51,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:25:51,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:25:50" (1/3) ... [2019-11-15 22:25:51,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b3905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:25:51, skipping insertion in model container [2019-11-15 22:25:51,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:51" (2/3) ... [2019-11-15 22:25:51,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b3905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:25:51, skipping insertion in model container [2019-11-15 22:25:51,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:25:51" (3/3) ... [2019-11-15 22:25:51,764 INFO L109 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2019-11-15 22:25:51,773 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:25:51,780 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:25:51,791 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:25:51,812 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:25:51,812 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:25:51,813 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:25:51,813 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:25:51,813 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:25:51,813 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:25:51,813 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:25:51,814 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:25:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-11-15 22:25:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-15 22:25:51,836 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:51,837 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] [2019-11-15 22:25:51,839 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash 94244302, now seen corresponding path program 1 times [2019-11-15 22:25:51,852 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:51,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716366314] [2019-11-15 22:25:51,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:51,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:51,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:25:52,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716366314] [2019-11-15 22:25:52,146 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:25:52,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-15 22:25:52,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135440910] [2019-11-15 22:25:52,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:25:52,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:25:52,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:25:52,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:25:52,170 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2019-11-15 22:25:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:52,358 INFO L93 Difference]: Finished difference Result 78 states and 105 transitions. [2019-11-15 22:25:52,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:25:52,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-15 22:25:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:52,368 INFO L225 Difference]: With dead ends: 78 [2019-11-15 22:25:52,368 INFO L226 Difference]: Without dead ends: 35 [2019-11-15 22:25:52,371 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:25:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-15 22:25:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-15 22:25:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-15 22:25:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-11-15 22:25:52,417 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 24 [2019-11-15 22:25:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:52,417 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-11-15 22:25:52,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:25:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-11-15 22:25:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-15 22:25:52,420 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:52,420 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] [2019-11-15 22:25:52,420 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash -510671284, now seen corresponding path program 1 times [2019-11-15 22:25:52,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:25:52,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679172032] [2019-11-15 22:25:52,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:52,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:25:52,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:25:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:52,720 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Undeclared function symbol (const Int) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1305) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1186) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.TermTransferrer.convertApplicationTerm(TermTransferrer.java:182) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) 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.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:574) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:172) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-15 22:25:52,724 INFO L168 Benchmark]: Toolchain (without parser) took 1744.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 948.7 MB in the beginning and 1.1 GB in the end (delta: -112.7 MB). Peak memory consumption was 49.3 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:52,725 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:25:52,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -205.5 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:52,726 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.53 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:25:52,727 INFO L168 Benchmark]: Boogie Preprocessor took 32.24 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: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:52,727 INFO L168 Benchmark]: RCFGBuilder took 408.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:52,728 INFO L168 Benchmark]: TraceAbstraction took 965.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.6 MB). Peak memory consumption was 59.6 MB. Max. memory is 11.5 GB. [2019-11-15 22:25:52,731 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 289.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -205.5 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.53 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.24 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: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 408.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 965.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 59.6 MB). Peak memory consumption was 59.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Undeclared function symbol (const Int) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Undeclared function symbol (const Int): de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-11-15 22:25:54,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:25:54,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:25:54,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:25:54,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:25:54,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:25:54,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:25:54,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:25:54,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:25:54,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:25:54,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:25:54,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:25:54,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:25:54,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:25:54,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:25:54,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:25:54,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:25:54,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:25:54,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:25:54,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:25:54,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:25:54,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:25:54,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:25:54,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:25:54,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:25:54,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:25:54,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:25:54,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:25:54,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:25:54,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:25:54,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:25:54,866 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:25:54,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:25:54,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:25:54,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:25:54,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:25:54,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:25:54,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:25:54,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:25:54,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:25:54,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:25:54,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-15 22:25:54,887 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:25:54,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:25:54,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:25:54,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:25:54,889 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:25:54,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:25:54,890 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:25:54,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:25:54,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:25:54,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:25:54,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:25:54,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:25:54,891 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 22:25:54,891 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 22:25:54,891 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:25:54,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:25:54,892 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:25:54,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:25:54,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:25:54,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:25:54,893 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:25:54,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:25:54,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:25:54,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:25:54,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:25:54,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:25:54,894 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 22:25:54,894 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 22:25:54,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:25:54,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 22:25:54,895 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/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 -> 1142409cf6d95759e551b0a166d386d83f24e4ed [2019-11-15 22:25:54,924 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:25:54,934 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:25:54,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:25:54,938 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:25:54,939 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:25:54,939 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2019-11-15 22:25:54,991 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data/9efe8a673/aa060830a0d34c7db43070a562d3cd4a/FLAGc2975c41e [2019-11-15 22:25:55,381 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:25:55,382 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/sv-benchmarks/c/verifythis/prefixsum_rec.c [2019-11-15 22:25:55,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data/9efe8a673/aa060830a0d34c7db43070a562d3cd4a/FLAGc2975c41e [2019-11-15 22:25:55,399 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/data/9efe8a673/aa060830a0d34c7db43070a562d3cd4a [2019-11-15 22:25:55,402 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:25:55,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:25:55,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:25:55,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:25:55,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:25:55,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cfa1c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55, skipping insertion in model container [2019-11-15 22:25:55,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,417 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:25:55,433 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:25:55,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:25:55,600 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:25:55,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:25:55,641 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:25:55,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55 WrapperNode [2019-11-15 22:25:55,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:25:55,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:25:55,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:25:55,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:25:55,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:25:55,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:25:55,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:25:55,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:25:55,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... [2019-11-15 22:25:55,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:25:55,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:25:55,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:25:55,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:25:55,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:25:55,844 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2019-11-15 22:25:55,844 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2019-11-15 22:25:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 22:25:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-15 22:25:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2019-11-15 22:25:55,845 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2019-11-15 22:25:55,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:25:55,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:25:55,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-15 22:25:56,248 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:25:56,248 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-15 22:25:56,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:25:56 BoogieIcfgContainer [2019-11-15 22:25:56,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:25:56,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:25:56,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:25:56,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:25:56,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:25:55" (1/3) ... [2019-11-15 22:25:56,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3f4040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:25:56, skipping insertion in model container [2019-11-15 22:25:56,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:25:55" (2/3) ... [2019-11-15 22:25:56,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3f4040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:25:56, skipping insertion in model container [2019-11-15 22:25:56,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:25:56" (3/3) ... [2019-11-15 22:25:56,256 INFO L109 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2019-11-15 22:25:56,264 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:25:56,271 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:25:56,280 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:25:56,299 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:25:56,299 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:25:56,299 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:25:56,299 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:25:56,299 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:25:56,299 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:25:56,300 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:25:56,300 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:25:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-11-15 22:25:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-15 22:25:56,320 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:56,321 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] [2019-11-15 22:25:56,322 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:56,327 INFO L82 PathProgramCache]: Analyzing trace with hash 94244302, now seen corresponding path program 1 times [2019-11-15 22:25:56,335 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:25:56,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [844346416] [2019-11-15 22:25:56,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:25:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:56,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 22:25:56,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:25:56,618 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 22:25:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:25:56,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [844346416] [2019-11-15 22:25:56,673 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:25:56,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-15 22:25:56,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295620946] [2019-11-15 22:25:56,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:25:56,678 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 22:25:56,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:25:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:25:56,693 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 7 states. [2019-11-15 22:25:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:25:56,875 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2019-11-15 22:25:56,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:25:56,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-11-15 22:25:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:25:56,885 INFO L225 Difference]: With dead ends: 77 [2019-11-15 22:25:56,885 INFO L226 Difference]: Without dead ends: 34 [2019-11-15 22:25:56,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:25:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-15 22:25:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-15 22:25:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-15 22:25:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-11-15 22:25:56,927 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 24 [2019-11-15 22:25:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:25:56,928 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-11-15 22:25:56,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:25:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-11-15 22:25:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-15 22:25:56,930 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:25:56,931 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] [2019-11-15 22:25:57,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:25:57,133 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:25:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:25:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash -510671284, now seen corresponding path program 1 times [2019-11-15 22:25:57,134 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 22:25:57,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [304399227] [2019-11-15 22:25:57,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bab34356-ea41-40d3-bc1a-1c4816c5fe76/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:25:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:25:57,332 WARN L254 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-15 22:25:57,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:25:57,376 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-15 22:25:57,376 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:25:57,387 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:25:57,392 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 7 treesize of output 6 [2019-11-15 22:25:57,393 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:25:57,407 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:25:57,407 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:25:57,408 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2019-11-15 22:25:57,447 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:25:57,447 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2019-11-15 22:25:57,450 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:25:57,464 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:25:57,470 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2019-11-15 22:25:57,471 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:25:57,486 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:25:57,486 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:25:57,486 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:20 [2019-11-15 22:25:57,546 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2019-11-15 22:25:57,547 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:25:57,584 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:25:57,585 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 22:25:57,586 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:41 [2019-11-15 22:25:59,655 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 27 [2019-11-15 22:26:01,729 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 24 [2019-11-15 22:26:03,828 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 24 [2019-11-15 22:26:04,106 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2019-11-15 22:26:04,107 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:26:04,132 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:26:04,133 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 22:26:04,133 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:61 [2019-11-15 22:26:04,187 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2019-11-15 22:26:04,188 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:26:04,225 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:26:04,226 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 22:26:04,226 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:41 [2019-11-15 22:26:04,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-15 22:26:04,641 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.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-15 22:26:04,645 INFO L168 Benchmark]: Toolchain (without parser) took 9241.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 952.4 MB in the beginning and 1.0 GB in the end (delta: -53.1 MB). Peak memory consumption was 113.1 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:04,646 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:26:04,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.79 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 934.9 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:04,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 934.9 MB in the beginning and 1.2 GB in the end (delta: -220.4 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:04,647 INFO L168 Benchmark]: Boogie Preprocessor took 41.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:26:04,648 INFO L168 Benchmark]: RCFGBuilder took 469.16 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: 26.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:04,649 INFO L168 Benchmark]: TraceAbstraction took 8393.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 123.3 MB). Peak memory consumption was 123.3 MB. Max. memory is 11.5 GB. [2019-11-15 22:26:04,652 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 237.79 ms. Allocated memory is still 1.0 GB. Free memory was 952.4 MB in the beginning and 934.9 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 96.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 934.9 MB in the beginning and 1.2 GB in the end (delta: -220.4 MB). Peak memory consumption was 12.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 41.36 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 469.16 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: 26.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8393.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 123.3 MB). Peak memory consumption was 123.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...