./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/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 588716e5dd1c3d01882e1bf0a06b3529d9c3d880 ....................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-22 13:04:46,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:04:46,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:04:46,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:04:46,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:04:46,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:04:46,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:04:46,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:04:46,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:04:46,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:04:46,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:04:46,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:04:46,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:04:46,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:04:46,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:04:46,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:04:46,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:04:46,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:04:46,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:04:46,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:04:46,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:04:46,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:04:46,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:04:46,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:04:46,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:04:46,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:04:46,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:04:46,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:04:46,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:04:46,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:04:46,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:04:46,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:04:46,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:04:46,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:04:46,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:04:46,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:04:46,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:04:46,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:04:46,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:04:46,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:04:46,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:04:46,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 13:04:46,839 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:04:46,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:04:46,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:04:46,844 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:04:46,845 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:04:46,845 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:04:46,845 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:04:46,845 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:04:46,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:04:46,846 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:04:46,847 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:04:46,847 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:04:46,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:04:46,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:04:46,848 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:04:46,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:04:46,849 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:04:46,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:04:46,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:04:46,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:04:46,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:04:46,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:04:46,851 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 13:04:46,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:04:46,851 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:04:46,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:04:46,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:04:46,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:04:46,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:04:46,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:04:46,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:04:46,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:04:46,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:04:46,855 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:04:46,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:04:46,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:04:46,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:04:46,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:04:46,856 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588716e5dd1c3d01882e1bf0a06b3529d9c3d880 [2020-11-22 13:04:47,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:04:47,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:04:47,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:04:47,202 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:04:47,203 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:04:47,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c [2020-11-22 13:04:47,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/data/65e92bb6f/5c37f45671a4487088c86dae94d8a2fd/FLAG9f5942f0b [2020-11-22 13:04:47,836 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:04:47,837 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c [2020-11-22 13:04:47,847 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/data/65e92bb6f/5c37f45671a4487088c86dae94d8a2fd/FLAG9f5942f0b [2020-11-22 13:04:48,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/data/65e92bb6f/5c37f45671a4487088c86dae94d8a2fd [2020-11-22 13:04:48,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:04:48,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:04:48,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:48,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:04:48,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:04:48,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151fb33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48, skipping insertion in model container [2020-11-22 13:04:48,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:04:48,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:04:48,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:48,411 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:04:48,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:04:48,461 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:04:48,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48 WrapperNode [2020-11-22 13:04:48,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:04:48,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:48,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:04:48,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:04:48,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:04:48,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:04:48,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:04:48,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:04:48,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... [2020-11-22 13:04:48,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:04:48,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:04:48,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:04:48,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:04:48,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/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 [2020-11-22 13:04:48,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:04:48,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:04:48,891 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:04:48,891 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-22 13:04:48,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:48 BoogieIcfgContainer [2020-11-22 13:04:48,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:04:48,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:04:48,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:04:48,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:04:48,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:04:48" (1/3) ... [2020-11-22 13:04:48,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db76e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:04:48, skipping insertion in model container [2020-11-22 13:04:48,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:04:48" (2/3) ... [2020-11-22 13:04:48,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db76e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:04:48, skipping insertion in model container [2020-11-22 13:04:48,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:48" (3/3) ... [2020-11-22 13:04:48,905 INFO L111 eAbstractionObserver]: Analyzing ICFG PodelskiRybalchenko-LICS2004-Fig2-TACAS2011-Fig3.c [2020-11-22 13:04:48,916 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:04:48,920 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-22 13:04:48,932 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-22 13:04:48,967 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:04:48,967 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:04:48,967 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:04:48,967 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:04:48,968 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:04:48,968 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:04:48,968 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:04:48,968 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:04:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-22 13:04:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:04:48,995 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:48,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:04:48,996 INFO L429 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]=== [2020-11-22 13:04:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2020-11-22 13:04:49,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:49,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105392572] [2020-11-22 13:04:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:49,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105392572] [2020-11-22 13:04:49,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:49,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:04:49,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11133849] [2020-11-22 13:04:49,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:04:49,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:49,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:04:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:04:49,244 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-11-22 13:04:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:49,370 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-22 13:04:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:04:49,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-22 13:04:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:49,383 INFO L225 Difference]: With dead ends: 33 [2020-11-22 13:04:49,384 INFO L226 Difference]: Without dead ends: 29 [2020-11-22 13:04:49,387 INFO L677 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 [2020-11-22 13:04:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-22 13:04:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2020-11-22 13:04:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 13:04:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-22 13:04:49,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 4 [2020-11-22 13:04:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:49,439 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-22 13:04:49,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:04:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-22 13:04:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:04:49,441 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:49,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:04:49,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:04:49,442 INFO L429 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]=== [2020-11-22 13:04:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:49,445 INFO L82 PathProgramCache]: Analyzing trace with hash 963339, now seen corresponding path program 1 times [2020-11-22 13:04:49,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:49,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330703308] [2020-11-22 13:04:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:49,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330703308] [2020-11-22 13:04:49,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:49,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:04:49,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881796730] [2020-11-22 13:04:49,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:04:49,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:04:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:04:49,508 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-11-22 13:04:49,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:49,586 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-11-22 13:04:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:04:49,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-22 13:04:49,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:49,588 INFO L225 Difference]: With dead ends: 31 [2020-11-22 13:04:49,588 INFO L226 Difference]: Without dead ends: 30 [2020-11-22 13:04:49,589 INFO L677 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 [2020-11-22 13:04:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-22 13:04:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2020-11-22 13:04:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-22 13:04:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-22 13:04:49,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-11-22 13:04:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:49,595 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-22 13:04:49,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:04:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-22 13:04:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:04:49,598 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:49,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:04:49,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:04:49,598 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:04:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash 29869514, now seen corresponding path program 1 times [2020-11-22 13:04:49,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:49,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52860722] [2020-11-22 13:04:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:49,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52860722] [2020-11-22 13:04:49,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:49,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:04:49,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515479197] [2020-11-22 13:04:49,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:04:49,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:49,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:04:49,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:49,660 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-11-22 13:04:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:49,675 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-11-22 13:04:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:04:49,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 13:04:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:49,677 INFO L225 Difference]: With dead ends: 22 [2020-11-22 13:04:49,677 INFO L226 Difference]: Without dead ends: 21 [2020-11-22 13:04:49,677 INFO L677 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 [2020-11-22 13:04:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-22 13:04:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-22 13:04:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-22 13:04:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-11-22 13:04:49,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 5 [2020-11-22 13:04:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:49,682 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-11-22 13:04:49,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:04:49,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-11-22 13:04:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:04:49,683 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:49,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:04:49,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:04:49,684 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:04:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:49,688 INFO L82 PathProgramCache]: Analyzing trace with hash 29863556, now seen corresponding path program 1 times [2020-11-22 13:04:49,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:49,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606976393] [2020-11-22 13:04:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:04:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:04:49,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606976393] [2020-11-22 13:04:49,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:04:49,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:04:49,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537693157] [2020-11-22 13:04:49,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:04:49,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:04:49,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:04:49,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:04:49,735 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-11-22 13:04:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:04:49,756 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-11-22 13:04:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:04:49,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 13:04:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:04:49,757 INFO L225 Difference]: With dead ends: 21 [2020-11-22 13:04:49,757 INFO L226 Difference]: Without dead ends: 19 [2020-11-22 13:04:49,758 INFO L677 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 [2020-11-22 13:04:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-22 13:04:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-22 13:04:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-22 13:04:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-22 13:04:49,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 5 [2020-11-22 13:04:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:04:49,762 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-22 13:04:49,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:04:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-22 13:04:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:04:49,763 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:04:49,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:04:49,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:04:49,764 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:04:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:04:49,764 INFO L82 PathProgramCache]: Analyzing trace with hash 925954989, now seen corresponding path program 1 times [2020-11-22 13:04:49,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:04:49,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730946010] [2020-11-22 13:04:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:04:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:04:49,776 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:04:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:04:49,783 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:04:49,805 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:04:49,805 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:04:49,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:04:49,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:04:49 BoogieIcfgContainer [2020-11-22 13:04:49,831 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:04:49,832 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:04:49,832 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:04:49,832 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:04:49,833 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:04:48" (3/4) ... [2020-11-22 13:04:49,835 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:04:49,882 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_53a74391-df4c-4340-9aa1-8ec8c7f609e7/bin/utaipan/witness.graphml [2020-11-22 13:04:49,882 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:04:49,884 INFO L168 Benchmark]: Toolchain (without parser) took 1669.47 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 58.6 MB in the beginning and 61.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:49,885 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 47.3 MB in the beginning and 47.2 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:04:49,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.42 ms. Allocated memory is still 88.1 MB. Free memory was 58.4 MB in the beginning and 67.1 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:49,886 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.70 ms. Allocated memory is still 88.1 MB. Free memory was 67.1 MB in the beginning and 65.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:04:49,886 INFO L168 Benchmark]: Boogie Preprocessor took 16.84 ms. Allocated memory is still 88.1 MB. Free memory was 65.7 MB in the beginning and 64.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:49,887 INFO L168 Benchmark]: RCFGBuilder took 384.29 ms. Allocated memory is still 88.1 MB. Free memory was 64.7 MB in the beginning and 53.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:49,887 INFO L168 Benchmark]: TraceAbstraction took 936.44 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 53.5 MB in the beginning and 63.5 MB in the end (delta: -10.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:49,888 INFO L168 Benchmark]: Witness Printer took 50.54 ms. Allocated memory is still 111.1 MB. Free memory was 63.5 MB in the beginning and 61.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:04:49,890 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 47.3 MB in the beginning and 47.2 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 243.42 ms. Allocated memory is still 88.1 MB. Free memory was 58.4 MB in the beginning and 67.1 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.70 ms. Allocated memory is still 88.1 MB. Free memory was 67.1 MB in the beginning and 65.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.84 ms. Allocated memory is still 88.1 MB. Free memory was 65.7 MB in the beginning and 64.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 384.29 ms. Allocated memory is still 88.1 MB. Free memory was 64.7 MB in the beginning and 53.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 936.44 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 53.5 MB in the beginning and 63.5 MB in the end (delta: -10.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * Witness Printer took 50.54 ms. Allocated memory is still 111.1 MB. Free memory was 63.5 MB in the beginning and 61.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 29]: integer overflow possible integer overflow possible We found a FailurePath: [L18] int x, y, oldx, oldy; [L19] x = __VERIFIER_nondet_int() [L20] y = __VERIFIER_nondet_int() [L21] COND TRUE x > 0 && y > 0 [L22] oldx = x [L23] oldy = y [L24] COND FALSE !(__VERIFIER_nondet_int() != 0) [L28] EXPR oldy - 2 [L28] x = oldy - 2 [L29] oldx + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 65 SDslu, 36 SDs, 0 SdLazy, 48 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, 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, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 134 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...