./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/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 554582d6fc3de8e87f5dd30e5019302b6e1b96be ................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis No suitable file found in config dir /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/config using search string *Overflow*64bit*_Bitvector*.epf No suitable settings file found using Overflow*64bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:16:50,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:16:50,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:16:50,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:16:50,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:16:50,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:16:50,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:16:50,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:16:50,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:16:50,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:16:50,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:16:50,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:16:50,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:16:50,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:16:50,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:16:50,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:16:50,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:16:50,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:16:50,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:16:50,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:16:50,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:16:50,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:16:50,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:16:50,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:16:50,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:16:50,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:16:50,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:16:50,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:16:50,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:16:50,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:16:50,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:16:50,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:16:50,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:16:50,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:16:50,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:16:50,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:16:50,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:16:50,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:16:50,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:16:50,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:16:50,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:16:50,335 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-11-26 02:16:50,358 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:16:50,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:16:50,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:16:50,359 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:16:50,359 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:16:50,359 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:16:50,360 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:16:50,360 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:16:50,360 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:16:50,360 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:16:50,360 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:16:50,360 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:16:50,361 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:16:50,361 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:16:50,361 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:16:50,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:16:50,362 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:16:50,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:16:50,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:16:50,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:16:50,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:16:50,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:16:50,363 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:16:50,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:16:50,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:16:50,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:16:50,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:16:50,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:16:50,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:16:50,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:16:50,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:16:50,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:16:50,365 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:16:50,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:16:50,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:16:50,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:16:50,365 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_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/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 -> 554582d6fc3de8e87f5dd30e5019302b6e1b96be [2019-11-26 02:16:50,544 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:16:50,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:16:50,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:16:50,561 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:16:50,561 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:16:50,562 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex4.c [2019-11-26 02:16:50,621 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/data/f5b34bc59/a0c059cbbbea443aa8c5840d6e371d6a/FLAG8d421a9b5 [2019-11-26 02:16:50,987 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:16:50,987 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex4.c [2019-11-26 02:16:50,992 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/data/f5b34bc59/a0c059cbbbea443aa8c5840d6e371d6a/FLAG8d421a9b5 [2019-11-26 02:16:51,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/data/f5b34bc59/a0c059cbbbea443aa8c5840d6e371d6a [2019-11-26 02:16:51,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:16:51,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:16:51,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:16:51,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:16:51,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:16:51,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fdd7dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51, skipping insertion in model container [2019-11-26 02:16:51,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:16:51,401 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:16:51,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:16:51,549 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:16:51,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:16:51,635 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:16:51,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51 WrapperNode [2019-11-26 02:16:51,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:16:51,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:16:51,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:16:51,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:16:51,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:16:51,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:16:51,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:16:51,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:16:51,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... [2019-11-26 02:16:51,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:16:51,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:16:51,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:16:51,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:16:51,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/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 [2019-11-26 02:16:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure p [2019-11-26 02:16:51,758 INFO L138 BoogieDeclarations]: Found implementation of procedure p [2019-11-26 02:16:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:16:51,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:16:52,021 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:16:52,021 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:16:52,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:16:52 BoogieIcfgContainer [2019-11-26 02:16:52,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:16:52,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:16:52,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:16:52,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:16:52,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:16:51" (1/3) ... [2019-11-26 02:16:52,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f424ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:16:52, skipping insertion in model container [2019-11-26 02:16:52,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:16:51" (2/3) ... [2019-11-26 02:16:52,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f424ef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:16:52, skipping insertion in model container [2019-11-26 02:16:52,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:16:52" (3/3) ... [2019-11-26 02:16:52,031 INFO L109 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex4.c [2019-11-26 02:16:52,040 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:16:52,045 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-26 02:16:52,056 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-26 02:16:52,077 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:16:52,077 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:16:52,077 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:16:52,078 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:16:52,078 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:16:52,078 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:16:52,078 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:16:52,078 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:16:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-26 02:16:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:16:52,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:52,099 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:16:52,099 INFO L410 AbstractCegarLoop]: === Iteration 1 === [pErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:16:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1571177437, now seen corresponding path program 1 times [2019-11-26 02:16:52,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:16:52,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610402618] [2019-11-26 02:16:52,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:16:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:16:52,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610402618] [2019-11-26 02:16:52,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:52,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:16:52,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831237212] [2019-11-26 02:16:52,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:16:52,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:16:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:16:52,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:16:52,352 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-11-26 02:16:52,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:52,492 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2019-11-26 02:16:52,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:16:52,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-26 02:16:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:52,501 INFO L225 Difference]: With dead ends: 42 [2019-11-26 02:16:52,501 INFO L226 Difference]: Without dead ends: 28 [2019-11-26 02:16:52,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:16:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-26 02:16:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2019-11-26 02:16:52,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-26 02:16:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-26 02:16:52,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2019-11-26 02:16:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:52,540 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-26 02:16:52,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:16:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-26 02:16:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:16:52,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:52,540 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:52,541 INFO L410 AbstractCegarLoop]: === Iteration 2 === [pErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:16:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:52,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1461860328, now seen corresponding path program 1 times [2019-11-26 02:16:52,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:16:52,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488971714] [2019-11-26 02:16:52,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:16:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:16:52,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488971714] [2019-11-26 02:16:52,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:52,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:16:52,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965922641] [2019-11-26 02:16:52,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:16:52,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:16:52,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:16:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:16:52,571 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2019-11-26 02:16:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:52,583 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-11-26 02:16:52,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:16:52,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-26 02:16:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:52,584 INFO L225 Difference]: With dead ends: 19 [2019-11-26 02:16:52,584 INFO L226 Difference]: Without dead ends: 18 [2019-11-26 02:16:52,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:16:52,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-26 02:16:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-26 02:16:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-26 02:16:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-26 02:16:52,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 7 [2019-11-26 02:16:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:52,590 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-26 02:16:52,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:16:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-26 02:16:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:16:52,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:52,591 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:52,591 INFO L410 AbstractCegarLoop]: === Iteration 3 === [pErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:16:52,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:52,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1461867311, now seen corresponding path program 1 times [2019-11-26 02:16:52,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:16:52,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742527906] [2019-11-26 02:16:52,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:16:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:16:52,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742527906] [2019-11-26 02:16:52,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:52,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:16:52,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59805528] [2019-11-26 02:16:52,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:16:52,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:16:52,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:16:52,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:16:52,634 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2019-11-26 02:16:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:52,704 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-11-26 02:16:52,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:16:52,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-11-26 02:16:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:52,706 INFO L225 Difference]: With dead ends: 30 [2019-11-26 02:16:52,706 INFO L226 Difference]: Without dead ends: 29 [2019-11-26 02:16:52,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:16:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-26 02:16:52,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-11-26 02:16:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-26 02:16:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-26 02:16:52,712 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2019-11-26 02:16:52,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:52,713 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-26 02:16:52,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:16:52,713 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-26 02:16:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:16:52,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:52,714 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:52,714 INFO L410 AbstractCegarLoop]: === Iteration 4 === [pErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:16:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:52,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1926753568, now seen corresponding path program 1 times [2019-11-26 02:16:52,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:16:52,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435141972] [2019-11-26 02:16:52,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:16:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:16:52,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435141972] [2019-11-26 02:16:52,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:16:52,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-26 02:16:52,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997856685] [2019-11-26 02:16:52,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:16:52,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:16:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:16:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:16:52,745 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-26 02:16:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:16:52,756 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-11-26 02:16:52,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:16:52,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-26 02:16:52,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:16:52,758 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:16:52,758 INFO L226 Difference]: Without dead ends: 23 [2019-11-26 02:16:52,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:16:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-26 02:16:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-26 02:16:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:16:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-26 02:16:52,763 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2019-11-26 02:16:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:16:52,764 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-26 02:16:52,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:16:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-26 02:16:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:16:52,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:16:52,765 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:16:52,766 INFO L410 AbstractCegarLoop]: === Iteration 5 === [pErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, pErr3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:16:52,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:16:52,766 INFO L82 PathProgramCache]: Analyzing trace with hash 168982822, now seen corresponding path program 1 times [2019-11-26 02:16:52,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:16:52,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636811926] [2019-11-26 02:16:52,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:16:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:16:52,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636811926] [2019-11-26 02:16:52,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248740290] [2019-11-26 02:16:52,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_990b4424-0d74-4c3d-be51-bc1b4b9a5fa9/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:16:52,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:16:52,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:16:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:16:52,934 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:16:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:16:53,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311421702] [2019-11-26 02:16:53,047 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-26 02:16:53,047 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:16:53,054 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:16:53,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:16:53,256 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) 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:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java: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) [2019-11-26 02:16:53,259 INFO L168 Benchmark]: Toolchain (without parser) took 1884.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -107.2 MB). Peak memory consumption was 48.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:53,260 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:16:53,261 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -201.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:53,261 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.13 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. [2019-11-26 02:16:53,262 INFO L168 Benchmark]: Boogie Preprocessor took 24.70 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:53,262 INFO L168 Benchmark]: RCFGBuilder took 335.92 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:53,263 INFO L168 Benchmark]: TraceAbstraction took 1234.66 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: 74.3 MB). Peak memory consumption was 74.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:16:53,266 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 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 261.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -201.1 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.13 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 24.70 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 335.92 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1234.66 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: 74.3 MB). Peak memory consumption was 74.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...