./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex3.06.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex3.06.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7a28cf8e40dd69f496c91c87e17176239a2f164b ....................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 15:04:14,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:04:14,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:04:14,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:04:14,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:04:14,655 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:04:14,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:04:14,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:04:14,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:04:14,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:04:14,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:04:14,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:04:14,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:04:14,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:04:14,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:04:14,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:04:14,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:04:14,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:04:14,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:04:14,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:04:14,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:04:14,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:04:14,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:04:14,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:04:14,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:04:14,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:04:14,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:04:14,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:04:14,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:04:14,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:04:14,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:04:14,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:04:14,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:04:14,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:04:14,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:04:14,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:04:14,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:04:14,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:04:14,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:04:14,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:04:14,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:04:14,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-12-07 15:04:14,694 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:04:14,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:04:14,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 15:04:14,695 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 15:04:14,695 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 15:04:14,695 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 15:04:14,695 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 15:04:14,695 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 15:04:14,696 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 15:04:14,696 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 15:04:14,696 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 15:04:14,696 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 15:04:14,696 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 15:04:14,697 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 15:04:14,697 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 15:04:14,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:04:14,698 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 15:04:14,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:04:14,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:04:14,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 15:04:14,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:04:14,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 15:04:14,699 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 15:04:14,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 15:04:14,699 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:04:14,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 15:04:14,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:04:14,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:04:14,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:04:14,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:04:14,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:04:14,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:04:14,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 15:04:14,701 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 15:04:14,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 15:04:14,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 15:04:14,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:04:14,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 15:04:14,702 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a28cf8e40dd69f496c91c87e17176239a2f164b [2019-12-07 15:04:14,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:04:14,823 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:04:14,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:04:14,827 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:04:14,827 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:04:14,827 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex3.06.c [2019-12-07 15:04:14,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/data/f3adb39e9/8caf16963e474b3e87fce84c4e56a506/FLAGd3d1fec14 [2019-12-07 15:04:15,175 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:04:15,175 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex3.06.c [2019-12-07 15:04:15,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/data/f3adb39e9/8caf16963e474b3e87fce84c4e56a506/FLAGd3d1fec14 [2019-12-07 15:04:15,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/data/f3adb39e9/8caf16963e474b3e87fce84c4e56a506 [2019-12-07 15:04:15,189 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:04:15,189 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:04:15,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:04:15,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:04:15,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:04:15,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8ebb28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15, skipping insertion in model container [2019-12-07 15:04:15,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:04:15,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:04:15,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:04:15,307 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:04:15,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:04:15,357 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:04:15,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15 WrapperNode [2019-12-07 15:04:15,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:04:15,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:04:15,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:04:15,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:04:15,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:04:15,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:04:15,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:04:15,377 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:04:15,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... [2019-12-07 15:04:15,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:04:15,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:04:15,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:04:15,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:04:15,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:04:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:04:15,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:04:15,540 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:04:15,541 INFO L287 CfgBuilder]: Removed 5 assume(true) statements. [2019-12-07 15:04:15,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:04:15 BoogieIcfgContainer [2019-12-07 15:04:15,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:04:15,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:04:15,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:04:15,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:04:15,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:04:15" (1/3) ... [2019-12-07 15:04:15,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d66e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:04:15, skipping insertion in model container [2019-12-07 15:04:15,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:04:15" (2/3) ... [2019-12-07 15:04:15,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d66e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:04:15, skipping insertion in model container [2019-12-07 15:04:15,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:04:15" (3/3) ... [2019-12-07 15:04:15,546 INFO L109 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex3.06.c [2019-12-07 15:04:15,553 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:04:15,557 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-12-07 15:04:15,564 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-12-07 15:04:15,578 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:04:15,578 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 15:04:15,578 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:04:15,578 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:04:15,578 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:04:15,578 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:04:15,579 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:04:15,579 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:04:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 15:04:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 15:04:15,591 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:04:15,592 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 15:04:15,592 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:04:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:04:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2019-12-07 15:04:15,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:04:15,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479122980] [2019-12-07 15:04:15,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:04:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:04:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:04:15,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479122980] [2019-12-07 15:04:15,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:04:15,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:04:15,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178396321] [2019-12-07 15:04:15,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:04:15,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:04:15,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:04:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:04:15,715 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2019-12-07 15:04:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:04:15,757 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-12-07 15:04:15,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:04:15,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-12-07 15:04:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:04:15,764 INFO L225 Difference]: With dead ends: 25 [2019-12-07 15:04:15,765 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 15:04:15,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:04:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 15:04:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2019-12-07 15:04:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 15:04:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-12-07 15:04:15,796 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2019-12-07 15:04:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:04:15,796 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-12-07 15:04:15,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:04:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-12-07 15:04:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 15:04:15,797 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:04:15,797 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 15:04:15,797 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 15:04:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:04:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2019-12-07 15:04:15,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:04:15,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681125866] [2019-12-07 15:04:15,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:04:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:04:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:04:15,822 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 15:04:15,822 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 15:04:15,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 03:04:15 BoogieIcfgContainer [2019-12-07 15:04:15,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 15:04:15,833 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 15:04:15,833 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 15:04:15,834 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 15:04:15,834 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:04:15" (3/4) ... [2019-12-07 15:04:15,835 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 15:04:15,860 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5ef7c805-86d2-4f4d-9934-f88f8994eea6/bin/utaipan/witness.graphml [2019-12-07 15:04:15,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 15:04:15,861 INFO L168 Benchmark]: Toolchain (without parser) took 671.31 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 947.8 MB in the beginning and 1.1 GB in the end (delta: -103.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:04:15,861 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:04:15,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 947.8 MB in the beginning and 1.1 GB in the end (delta: -149.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 15:04:15,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.36 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:04:15,863 INFO L168 Benchmark]: Boogie Preprocessor took 11.24 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 15:04:15,863 INFO L168 Benchmark]: RCFGBuilder took 153.16 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 15:04:15,863 INFO L168 Benchmark]: TraceAbstraction took 291.03 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: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:04:15,864 INFO L168 Benchmark]: Witness Printer took 26.42 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:04:15,866 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 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 167.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 947.8 MB in the beginning and 1.1 GB in the end (delta: -149.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.36 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.24 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 153.16 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: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 291.03 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: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * Witness Printer took 26.42 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, y, z; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] z = __VERIFIER_nondet_int() [L27] COND TRUE x < 0 [L28] x + z - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 6 error locations. Result: UNSAFE, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 9 SDslu, 16 SDs, 0 SdLazy, 15 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...