./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.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_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/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 df3ddc93bc6339292c9158119f1fdb949bb8842d ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:55:46,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:55:46,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:55:46,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:55:46,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:55:46,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:55:46,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:55:46,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:55:46,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:55:46,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:55:46,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:55:46,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:55:46,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:55:46,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:55:46,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:55:46,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:55:46,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:55:46,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:55:46,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:55:46,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:55:46,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:55:46,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:55:46,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:55:46,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:55:46,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:55:46,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:55:46,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:55:46,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:55:46,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:55:46,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:55:46,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:55:46,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:55:46,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:55:46,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:55:46,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:55:46,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:55:46,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:55:46,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:55:46,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:55:46,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:55:46,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:55:46,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 12:55:46,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:55:46,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:55:46,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:55:46,289 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:55:46,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:55:46,290 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:55:46,290 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:55:46,290 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:55:46,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:55:46,291 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:55:46,292 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:55:46,292 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:55:46,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:55:46,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:55:46,293 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:55:46,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:55:46,294 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 12:55:46,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:55:46,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:55:46,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:55:46,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:55:46,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:55:46,295 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 12:55:46,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:55:46,296 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:55:46,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:55:46,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:55:46,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:55:46,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:55:46,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:55:46,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:55:46,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:55:46,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:55:46,298 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:55:46,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:55:46,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:55:46,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:55:46,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:55:46,299 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_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3ddc93bc6339292c9158119f1fdb949bb8842d [2020-11-22 12:55:46,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:55:46,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:55:46,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:55:46,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:55:46,656 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:55:46,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2020-11-22 12:55:46,727 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/data/26eda1592/9de6c00aac354498be0fe9e8d2aacbda/FLAG2d034b99d [2020-11-22 12:55:47,248 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:55:47,248 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2020-11-22 12:55:47,258 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/data/26eda1592/9de6c00aac354498be0fe9e8d2aacbda/FLAG2d034b99d [2020-11-22 12:55:47,626 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/data/26eda1592/9de6c00aac354498be0fe9e8d2aacbda [2020-11-22 12:55:47,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:55:47,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:55:47,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:55:47,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:55:47,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:55:47,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27cdae8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47, skipping insertion in model container [2020-11-22 12:55:47,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:55:47,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:55:47,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:55:47,832 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:55:47,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:55:47,876 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:55:47,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47 WrapperNode [2020-11-22 12:55:47,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:55:47,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:55:47,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:55:47,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:55:47,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:55:47,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:55:47,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:55:47,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:55:47,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... [2020-11-22 12:55:47,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:55:47,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:55:47,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:55:47,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:55:47,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/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 12:55:48,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:55:48,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:55:48,282 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:55:48,282 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-22 12:55:48,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:55:48 BoogieIcfgContainer [2020-11-22 12:55:48,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:55:48,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:55:48,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:55:48,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:55:48,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:55:47" (1/3) ... [2020-11-22 12:55:48,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6719ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:55:48, skipping insertion in model container [2020-11-22 12:55:48,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:47" (2/3) ... [2020-11-22 12:55:48,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6719ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:55:48, skipping insertion in model container [2020-11-22 12:55:48,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:55:48" (3/3) ... [2020-11-22 12:55:48,292 INFO L111 eAbstractionObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a.c [2020-11-22 12:55:48,302 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:55:48,306 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-22 12:55:48,318 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 12:55:48,340 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:55:48,340 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:55:48,340 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:55:48,341 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:55:48,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:55:48,341 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:55:48,341 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:55:48,341 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:55:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-22 12:55:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:55:48,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:48,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:55:48,359 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:55:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2020-11-22 12:55:48,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:48,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104551061] [2020-11-22 12:55:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:48,515 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 12:55:48,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104551061] [2020-11-22 12:55:48,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:55:48,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:55:48,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853096531] [2020-11-22 12:55:48,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:55:48,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:48,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:55:48,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:55:48,539 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-11-22 12:55:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:48,625 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-22 12:55:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:55:48,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-22 12:55:48,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:48,635 INFO L225 Difference]: With dead ends: 12 [2020-11-22 12:55:48,635 INFO L226 Difference]: Without dead ends: 10 [2020-11-22 12:55:48,637 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 12:55:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-22 12:55:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-22 12:55:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-22 12:55:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-22 12:55:48,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 4 [2020-11-22 12:55:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:48,666 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-22 12:55:48,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:55:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-22 12:55:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:55:48,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:48,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:55:48,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:55:48,667 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:55:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:48,672 INFO L82 PathProgramCache]: Analyzing trace with hash 963339, now seen corresponding path program 1 times [2020-11-22 12:55:48,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:48,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415263872] [2020-11-22 12:55:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:48,697 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 12:55:48,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415263872] [2020-11-22 12:55:48,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:55:48,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:55:48,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829560305] [2020-11-22 12:55:48,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:55:48,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:48,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:55:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:55:48,700 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-11-22 12:55:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:48,771 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2020-11-22 12:55:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:55:48,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-22 12:55:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:48,773 INFO L225 Difference]: With dead ends: 15 [2020-11-22 12:55:48,773 INFO L226 Difference]: Without dead ends: 14 [2020-11-22 12:55:48,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 12:55:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-22 12:55:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-22 12:55:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-22 12:55:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-11-22 12:55:48,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 4 [2020-11-22 12:55:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:48,778 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-11-22 12:55:48,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:55:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-11-22 12:55:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:55:48,778 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:48,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:55:48,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:55:48,779 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:55:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:48,779 INFO L82 PathProgramCache]: Analyzing trace with hash 29869514, now seen corresponding path program 1 times [2020-11-22 12:55:48,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:48,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036485081] [2020-11-22 12:55:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:48,825 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 12:55:48,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036485081] [2020-11-22 12:55:48,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:55:48,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:55:48,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447492422] [2020-11-22 12:55:48,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:55:48,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:48,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:55:48,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:55:48,827 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2020-11-22 12:55:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:48,853 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2020-11-22 12:55:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:55:48,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 12:55:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:48,855 INFO L225 Difference]: With dead ends: 14 [2020-11-22 12:55:48,855 INFO L226 Difference]: Without dead ends: 13 [2020-11-22 12:55:48,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 12:55:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-22 12:55:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-22 12:55:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-22 12:55:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-11-22 12:55:48,859 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2020-11-22 12:55:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:48,859 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-11-22 12:55:48,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:55:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-11-22 12:55:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:55:48,860 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:48,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:55:48,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:55:48,860 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:55:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:48,861 INFO L82 PathProgramCache]: Analyzing trace with hash 29863556, now seen corresponding path program 1 times [2020-11-22 12:55:48,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:48,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013197435] [2020-11-22 12:55:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:48,904 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 12:55:48,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013197435] [2020-11-22 12:55:48,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:55:48,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:55:48,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612135910] [2020-11-22 12:55:48,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:55:48,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:55:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:55:48,906 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2020-11-22 12:55:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:48,924 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-11-22 12:55:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:55:48,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 12:55:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:48,925 INFO L225 Difference]: With dead ends: 13 [2020-11-22 12:55:48,926 INFO L226 Difference]: Without dead ends: 12 [2020-11-22 12:55:48,926 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 12:55:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-22 12:55:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-22 12:55:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-22 12:55:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-22 12:55:48,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2020-11-22 12:55:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:48,930 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-22 12:55:48,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:55:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-22 12:55:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:55:48,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:48,931 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-22 12:55:48,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:55:48,931 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:55:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:48,932 INFO L82 PathProgramCache]: Analyzing trace with hash 784501120, now seen corresponding path program 1 times [2020-11-22 12:55:48,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:48,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752450555] [2020-11-22 12:55:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:48,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752450555] [2020-11-22 12:55:48,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380728657] [2020-11-22 12:55:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/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 [2020-11-22 12:55:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:49,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 12:55:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:55:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:49,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:55:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:49,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:55:49,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 8 [2020-11-22 12:55:49,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212647281] [2020-11-22 12:55:49,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:55:49,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:49,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:55:49,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:55:49,169 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2020-11-22 12:55:49,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:49,292 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2020-11-22 12:55:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:55:49,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-22 12:55:49,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:49,293 INFO L225 Difference]: With dead ends: 20 [2020-11-22 12:55:49,293 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:55:49,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:55:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:55:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:55:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:55:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:55:49,294 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2020-11-22 12:55:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:49,295 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:55:49,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:55:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:55:49,295 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:55:49,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:55:49,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:55:49,558 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-11-22 12:55:49,558 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:55:49,558 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-22 12:55:49,559 INFO L274 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-11-22 12:55:49,559 INFO L270 CegarLoopResult]: At program point L17-2(lines 16 22) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648))) [2020-11-22 12:55:49,559 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-11-22 12:55:49,559 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-22 12:55:49,559 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:55:49,559 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-11-22 12:55:49,560 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-11-22 12:55:49,560 INFO L274 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-11-22 12:55:49,560 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-11-22 12:55:49,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:55:49 BoogieIcfgContainer [2020-11-22 12:55:49,575 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:55:49,575 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:55:49,575 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:55:49,575 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:55:49,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:55:48" (3/4) ... [2020-11-22 12:55:49,579 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:55:49,586 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 12:55:49,586 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 12:55:49,587 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:55:49,617 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f7b62cd2-3da7-4e2b-a8d9-d3430332c337/bin/utaipan/witness.graphml [2020-11-22 12:55:49,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:55:49,618 INFO L168 Benchmark]: Toolchain (without parser) took 1987.47 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 63.3 MB in the beginning and 88.8 MB in the end (delta: -25.5 MB). Peak memory consumption was 919.2 kB. Max. memory is 16.1 GB. [2020-11-22 12:55:49,619 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 35.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:55:49,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.77 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 63.3 MB in the beginning and 97.6 MB in the end (delta: -34.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:55:49,621 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.36 ms. Allocated memory is still 119.5 MB. Free memory was 97.6 MB in the beginning and 96.6 MB in the end (delta: 976.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:55:49,621 INFO L168 Benchmark]: Boogie Preprocessor took 16.31 ms. Allocated memory is still 119.5 MB. Free memory was 96.6 MB in the beginning and 95.6 MB in the end (delta: 967.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:55:49,622 INFO L168 Benchmark]: RCFGBuilder took 361.28 ms. Allocated memory is still 119.5 MB. Free memory was 95.6 MB in the beginning and 85.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:55:49,622 INFO L168 Benchmark]: TraceAbstraction took 1289.22 ms. Allocated memory is still 119.5 MB. Free memory was 84.5 MB in the beginning and 90.9 MB in the end (delta: -6.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:55:49,623 INFO L168 Benchmark]: Witness Printer took 41.63 ms. Allocated memory is still 119.5 MB. Free memory was 90.9 MB in the beginning and 88.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:55:49,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 52.1 MB in the beginning and 52.1 MB in the end (delta: 35.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 245.77 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 63.3 MB in the beginning and 97.6 MB in the end (delta: -34.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.36 ms. Allocated memory is still 119.5 MB. Free memory was 97.6 MB in the beginning and 96.6 MB in the end (delta: 976.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.31 ms. Allocated memory is still 119.5 MB. Free memory was 96.6 MB in the beginning and 95.6 MB in the end (delta: 967.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 361.28 ms. Allocated memory is still 119.5 MB. Free memory was 95.6 MB in the beginning and 85.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1289.22 ms. Allocated memory is still 119.5 MB. Free memory was 84.5 MB in the beginning and 90.9 MB in the end (delta: -6.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 41.63 ms. Allocated memory is still 119.5 MB. Free memory was 90.9 MB in the beginning and 88.8 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: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: x <= 2147483647 && 0 <= x + 2147483648 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 18 SDslu, 0 SDs, 0 SdLazy, 71 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 4 NumberOfFragments, 9 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 19 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 546 SizeOfPredicates, 1 NumberOfNonLiveVariables, 15 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 5/6 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 correct! Received shutdown request...