./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.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_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/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 7c08193784b646afd298f73ae6296b7af2e0cac1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:39:12,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:39:12,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:39:12,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:39:12,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:39:12,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:39:12,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:39:12,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:39:12,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:39:12,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:39:12,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:39:12,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:39:12,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:39:12,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:39:12,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:39:12,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:39:12,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:39:12,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:39:12,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:39:12,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:39:12,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:39:12,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:39:12,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:39:12,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:39:12,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:39:12,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:39:12,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:39:12,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:39:12,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:39:12,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:39:12,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:39:12,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:39:12,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:39:12,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:39:12,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:39:12,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:39:12,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:39:12,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:39:12,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:39:12,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:39:12,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:39:12,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-28 07:39:12,404 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:39:12,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:39:12,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:39:12,406 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:39:12,406 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:39:12,407 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:39:12,407 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:39:12,407 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:39:12,407 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:39:12,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:39:12,409 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:39:12,409 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:39:12,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:39:12,410 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:39:12,410 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:39:12,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:39:12,411 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:39:12,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:39:12,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:39:12,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:39:12,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:39:12,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:39:12,413 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 07:39:12,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:39:12,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:39:12,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:39:12,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:39:12,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:39:12,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:39:12,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:39:12,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:39:12,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:39:12,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:39:12,417 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:39:12,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:39:12,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:39:12,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:39:12,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:39:12,418 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_025531cb-9964-4ddf-a49f-b43272ce4f45/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c08193784b646afd298f73ae6296b7af2e0cac1 [2020-11-28 07:39:12,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:39:12,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:39:12,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:39:12,699 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:39:12,700 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:39:12,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2020-11-28 07:39:12,789 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/data/13c73b1c1/fb63be00e9694fcb8de82c7fa852fdb7/FLAGd5e349625 [2020-11-28 07:39:13,260 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:39:13,261 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2020-11-28 07:39:13,272 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/data/13c73b1c1/fb63be00e9694fcb8de82c7fa852fdb7/FLAGd5e349625 [2020-11-28 07:39:13,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/data/13c73b1c1/fb63be00e9694fcb8de82c7fa852fdb7 [2020-11-28 07:39:13,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:39:13,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:39:13,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:13,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:39:13,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:39:13,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e77336e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13, skipping insertion in model container [2020-11-28 07:39:13,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:39:13,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:39:13,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:13,889 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:39:13,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:39:13,923 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:39:13,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13 WrapperNode [2020-11-28 07:39:13,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:39:13,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:13,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:39:13,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:39:13,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:39:13,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:39:13,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:39:13,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:39:13,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... [2020-11-28 07:39:13,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:39:13,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:39:13,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:39:13,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:39:13,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/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 [2020-11-28 07:39:14,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:39:14,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:39:14,399 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:39:14,399 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 07:39:14,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:14 BoogieIcfgContainer [2020-11-28 07:39:14,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:39:14,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:39:14,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:39:14,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:39:14,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:39:13" (1/3) ... [2020-11-28 07:39:14,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3292470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:14, skipping insertion in model container [2020-11-28 07:39:14,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:39:13" (2/3) ... [2020-11-28 07:39:14,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3292470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:39:14, skipping insertion in model container [2020-11-28 07:39:14,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:14" (3/3) ... [2020-11-28 07:39:14,409 INFO L111 eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig1.c [2020-11-28 07:39:14,420 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:39:14,424 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-28 07:39:14,436 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-28 07:39:14,459 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:39:14,460 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:39:14,460 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:39:14,460 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:39:14,460 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:39:14,460 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:39:14,460 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:39:14,461 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:39:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-28 07:39:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:39:14,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:14,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:39:14,484 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:39:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:14,492 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2020-11-28 07:39:14,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:14,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472648655] [2020-11-28 07:39:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:14,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472648655] [2020-11-28 07:39:14,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:14,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:39:14,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917570419] [2020-11-28 07:39:14,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:39:14,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:39:14,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:39:14,681 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-11-28 07:39:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:14,757 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-28 07:39:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:39:14,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:39:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:14,769 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:39:14,769 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 07:39:14,771 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 [2020-11-28 07:39:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 07:39:14,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2020-11-28 07:39:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:39:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-28 07:39:14,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 4 [2020-11-28 07:39:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:14,800 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-28 07:39:14,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:39:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-28 07:39:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:39:14,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:14,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:39:14,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:39:14,801 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:39:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash 964251, now seen corresponding path program 1 times [2020-11-28 07:39:14,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:14,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272151172] [2020-11-28 07:39:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:14,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272151172] [2020-11-28 07:39:14,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:14,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:39:14,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293916106] [2020-11-28 07:39:14,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:14,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:14,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:14,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:39:14,845 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2020-11-28 07:39:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:14,940 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-28 07:39:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:39:14,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-28 07:39:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:14,941 INFO L225 Difference]: With dead ends: 19 [2020-11-28 07:39:14,941 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:39:14,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:39:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:39:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2020-11-28 07:39:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 07:39:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-28 07:39:14,945 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 4 [2020-11-28 07:39:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:14,946 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-28 07:39:14,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-11-28 07:39:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:39:14,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:14,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:39:14,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:39:14,947 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:39:14,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash 29869514, now seen corresponding path program 1 times [2020-11-28 07:39:14,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:14,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734914107] [2020-11-28 07:39:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:14,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734914107] [2020-11-28 07:39:14,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:14,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:39:14,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408991793] [2020-11-28 07:39:14,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:39:14,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:39:14,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:39:14,979 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-11-28 07:39:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,000 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-11-28 07:39:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:39:15,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-28 07:39:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,001 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:39:15,002 INFO L226 Difference]: Without dead ends: 14 [2020-11-28 07:39:15,002 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 [2020-11-28 07:39:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-28 07:39:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-28 07:39:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:39:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-28 07:39:15,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 5 [2020-11-28 07:39:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,006 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-28 07:39:15,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:39:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-28 07:39:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:39:15,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:39:15,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:39:15,008 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:39:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,008 INFO L82 PathProgramCache]: Analyzing trace with hash 29891841, now seen corresponding path program 1 times [2020-11-28 07:39:15,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247724403] [2020-11-28 07:39:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247724403] [2020-11-28 07:39:15,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:39:15,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:39:15,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338977386] [2020-11-28 07:39:15,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:39:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:39:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:39:15,040 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-11-28 07:39:15,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,055 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2020-11-28 07:39:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:39:15,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-28 07:39:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,057 INFO L225 Difference]: With dead ends: 13 [2020-11-28 07:39:15,057 INFO L226 Difference]: Without dead ends: 12 [2020-11-28 07:39:15,057 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 [2020-11-28 07:39:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-28 07:39:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 07:39:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 07:39:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-28 07:39:15,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2020-11-28 07:39:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,061 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-28 07:39:15,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:39:15,062 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-28 07:39:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:39:15,062 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,062 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:39:15,063 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:39:15,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1360166548, now seen corresponding path program 1 times [2020-11-28 07:39:15,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630776551] [2020-11-28 07:39:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630776551] [2020-11-28 07:39:15,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413122952] [2020-11-28 07:39:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/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 [2020-11-28 07:39:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:15,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:39:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:39:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:39:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:15,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744852027] [2020-11-28 07:39:15,265 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:39:15,266 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:39:15,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:39:15,276 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:39:15,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:39:15,468 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:39:15,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:39:15,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:39:15,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-11-28 07:39:15,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914825842] [2020-11-28 07:39:15,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:39:15,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:39:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:39:15,664 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2020-11-28 07:39:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:15,730 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-11-28 07:39:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:39:15,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-28 07:39:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:15,733 INFO L225 Difference]: With dead ends: 36 [2020-11-28 07:39:15,734 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 07:39:15,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:39:15,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 07:39:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2020-11-28 07:39:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:39:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-11-28 07:39:15,740 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 7 [2020-11-28 07:39:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:15,740 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-11-28 07:39:15,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:39:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-11-28 07:39:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:39:15,741 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:15,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:39:15,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:39:15,966 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:39:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1360165828, now seen corresponding path program 1 times [2020-11-28 07:39:15,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:15,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188522225] [2020-11-28 07:39:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:39:16,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188522225] [2020-11-28 07:39:16,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569035419] [2020-11-28 07:39:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-28 07:39:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:39:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:39:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:39:16,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:39:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:39:16,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:39:16,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 6 [2020-11-28 07:39:16,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115015374] [2020-11-28 07:39:16,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:39:16,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:39:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:39:16,083 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 4 states. [2020-11-28 07:39:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:16,117 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2020-11-28 07:39:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:39:16,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 07:39:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:16,119 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:39:16,119 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 07:39:16,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:39:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 07:39:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-11-28 07:39:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 07:39:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-11-28 07:39:16,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 7 [2020-11-28 07:39:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:16,124 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-11-28 07:39:16,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:39:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-11-28 07:39:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:39:16,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:39:16,128 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2020-11-28 07:39:16,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 07:39:16,329 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:39:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:39:16,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1477250187, now seen corresponding path program 2 times [2020-11-28 07:39:16,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:39:16,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853430190] [2020-11-28 07:39:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:39:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:39:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 07:39:16,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853430190] [2020-11-28 07:39:16,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821055755] [2020-11-28 07:39:16,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:39:16,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:39:16,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:39:16,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:39:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:39:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 07:39:16,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:39:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 07:39:16,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1378778509] [2020-11-28 07:39:16,454 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:39:16,455 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:39:16,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:39:16,455 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:39:16,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:39:16,530 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:39:16,710 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:39:16,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:39:16,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2020-11-28 07:39:16,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331102870] [2020-11-28 07:39:16,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:39:16,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:39:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:39:16,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:39:16,713 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-11-28 07:39:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:39:16,772 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2020-11-28 07:39:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:39:16,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 07:39:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:39:16,773 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:39:16,773 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:39:16,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:39:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:39:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:39:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:39:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:39:16,774 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-11-28 07:39:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:39:16,775 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:39:16,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:39:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:39:16,775 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:39:16,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 07:39:16,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:39:17,016 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-11-28 07:39:17,016 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:39:17,017 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2020-11-28 07:39:17,017 INFO L270 CegarLoopResult]: At program point L21-2(lines 21 23) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 2147483646) (<= ULTIMATE.start_main_~n~0 2147483647) (<= 0 (+ ULTIMATE.start_main_~i~0 2147483648))) [2020-11-28 07:39:17,017 INFO L274 CegarLoopResult]: For program point L21-3(lines 21 23) no Hoare annotation was computed. [2020-11-28 07:39:17,017 INFO L270 CegarLoopResult]: At program point L19-2(lines 19 25) the Hoare annotation is: (and (<= ULTIMATE.start_main_~n~0 2147483647) (<= 0 (+ ULTIMATE.start_main_~i~0 2147483648))) [2020-11-28 07:39:17,017 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-11-28 07:39:17,017 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2020-11-28 07:39:17,017 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:39:17,017 INFO L274 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-11-28 07:39:17,017 INFO L274 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-11-28 07:39:17,018 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-11-28 07:39:17,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:39:17 BoogieIcfgContainer [2020-11-28 07:39:17,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:39:17,033 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:39:17,033 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:39:17,034 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:39:17,034 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:39:14" (3/4) ... [2020-11-28 07:39:17,037 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:39:17,046 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-28 07:39:17,046 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 07:39:17,047 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:39:17,077 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_025531cb-9964-4ddf-a49f-b43272ce4f45/bin/utaipan/witness.graphml [2020-11-28 07:39:17,078 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:39:17,079 INFO L168 Benchmark]: Toolchain (without parser) took 3435.96 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 61.8 MB in the beginning and 67.3 MB in the end (delta: -5.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:17,080 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 50.8 MB in the beginning and 50.7 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:17,080 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.56 ms. Allocated memory is still 92.3 MB. Free memory was 61.5 MB in the beginning and 71.6 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:17,081 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.86 ms. Allocated memory is still 92.3 MB. Free memory was 71.6 MB in the beginning and 70.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:17,081 INFO L168 Benchmark]: Boogie Preprocessor took 15.55 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 69.3 MB in the end (delta: 842.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:39:17,082 INFO L168 Benchmark]: RCFGBuilder took 426.81 ms. Allocated memory is still 92.3 MB. Free memory was 69.3 MB in the beginning and 58.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:17,083 INFO L168 Benchmark]: TraceAbstraction took 2629.99 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 58.0 MB in the beginning and 69.4 MB in the end (delta: -11.4 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:17,083 INFO L168 Benchmark]: Witness Printer took 44.46 ms. Allocated memory is still 117.4 MB. Free memory was 69.4 MB in the beginning and 67.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:39:17,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 50.8 MB in the beginning and 50.7 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 281.56 ms. Allocated memory is still 92.3 MB. Free memory was 61.5 MB in the beginning and 71.6 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.86 ms. Allocated memory is still 92.3 MB. Free memory was 71.6 MB in the beginning and 70.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.55 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 69.3 MB in the end (delta: 842.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 426.81 ms. Allocated memory is still 92.3 MB. Free memory was 69.3 MB in the beginning and 58.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2629.99 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 58.0 MB in the beginning and 69.4 MB in the end (delta: -11.4 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. * Witness Printer took 44.46 ms. Allocated memory is still 117.4 MB. Free memory was 69.4 MB in the beginning and 67.3 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: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: 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: 19]: Loop Invariant Derived loop invariant: n <= 2147483647 && 0 <= i + 2147483648 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((0 <= j && i <= 2147483646) && n <= 2147483647) && 0 <= i + 2147483648 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 77 SDslu, 22 SDs, 0 SdLazy, 93 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=5, 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, 7 MinimizatonAttempts, 26 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 24 HoareAnnotationTreeSize, 2 FomulaSimplifications, 175 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 78 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 2793 SizeOfPredicates, 6 NumberOfNonLiveVariables, 67 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 68/87 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...