./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI --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 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:27:21,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:27:21,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:27:21,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:27:21,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:27:21,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:27:21,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:27:21,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:27:21,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:27:21,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:27:21,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:27:21,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:27:21,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:27:21,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:27:21,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:27:21,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:27:21,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:27:21,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:27:21,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:27:21,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:27:21,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:27:22,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:27:22,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:27:22,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:27:22,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:27:22,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:27:22,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:27:22,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:27:22,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:27:22,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:27:22,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:27:22,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:27:22,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:27:22,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:27:22,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:27:22,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:27:22,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:27:22,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:27:22,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:27:22,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:27:22,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:27:22,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-11 02:27:22,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:27:22,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:27:22,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:27:22,076 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:27:22,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:27:22,077 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:27:22,077 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:27:22,077 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:27:22,083 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:27:22,083 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:27:22,084 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:27:22,084 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:27:22,084 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:27:22,084 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:27:22,084 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:27:22,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:27:22,085 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:27:22,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:27:22,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:27:22,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:27:22,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:27:22,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:27:22,086 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-11 02:27:22,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:27:22,086 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:27:22,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:27:22,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:27:22,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:27:22,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:27:22,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:27:22,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:27:22,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:27:22,088 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:27:22,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:27:22,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:27:22,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:27:22,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:27:22,088 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_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 [2021-10-11 02:27:22,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:27:22,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:27:22,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:27:22,423 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:27:22,426 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:27:22,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2021-10-11 02:27:22,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/data/368851c1d/2f01a67c908e4ef8a01adb951a982ecd/FLAG41b5ee6d1 [2021-10-11 02:27:23,007 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:27:23,007 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2021-10-11 02:27:23,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/data/368851c1d/2f01a67c908e4ef8a01adb951a982ecd/FLAG41b5ee6d1 [2021-10-11 02:27:23,395 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/data/368851c1d/2f01a67c908e4ef8a01adb951a982ecd [2021-10-11 02:27:23,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:27:23,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:27:23,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:23,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:27:23,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:27:23,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421c18d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23, skipping insertion in model container [2021-10-11 02:27:23,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:27:23,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:27:23,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:23,565 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:27:23,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:23,613 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:27:23,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23 WrapperNode [2021-10-11 02:27:23,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:23,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:23,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:27:23,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:27:23,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:23,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:27:23,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:27:23,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:27:23,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... [2021-10-11 02:27:23,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:27:23,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:27:23,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:27:23,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:27:23,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:23,757 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-10-11 02:27:23,757 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-10-11 02:27:23,758 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-10-11 02:27:23,758 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-10-11 02:27:23,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:27:23,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:27:23,984 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:27:23,984 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-11 02:27:23,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:23 BoogieIcfgContainer [2021-10-11 02:27:23,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:27:23,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:27:23,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:27:23,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:27:23,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:23" (1/3) ... [2021-10-11 02:27:23,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b31878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:23, skipping insertion in model container [2021-10-11 02:27:23,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:23" (2/3) ... [2021-10-11 02:27:23,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b31878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:23, skipping insertion in model container [2021-10-11 02:27:23,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:23" (3/3) ... [2021-10-11 02:27:23,995 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1c.c [2021-10-11 02:27:24,009 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:27:24,012 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2021-10-11 02:27:24,022 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-11 02:27:24,064 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:27:24,064 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:27:24,064 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:27:24,064 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:27:24,064 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:27:24,064 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:27:24,065 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:27:24,065 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:27:24,081 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-10-11 02:27:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:27:24,086 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:24,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:27:24,087 INFO L429 AbstractCegarLoop]: === Iteration 1 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:24,093 INFO L82 PathProgramCache]: Analyzing trace with hash 70122184, now seen corresponding path program 1 times [2021-10-11 02:27:24,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:24,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624299574] [2021-10-11 02:27:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:24,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624299574] [2021-10-11 02:27:24,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:24,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:24,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316144521] [2021-10-11 02:27:24,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:27:24,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:27:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:27:24,321 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2021-10-11 02:27:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:24,391 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-11 02:27:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:27:24,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2021-10-11 02:27:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:24,400 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:27:24,400 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:27:24,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:27:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:27:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-11 02:27:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-11 02:27:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-10-11 02:27:24,446 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 5 [2021-10-11 02:27:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:24,446 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-10-11 02:27:24,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:27:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-10-11 02:27:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:27:24,447 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:24,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:27:24,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:27:24,448 INFO L429 AbstractCegarLoop]: === Iteration 2 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2121179530, now seen corresponding path program 1 times [2021-10-11 02:27:24,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:24,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758143077] [2021-10-11 02:27:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:24,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758143077] [2021-10-11 02:27:24,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:24,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:24,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789379045] [2021-10-11 02:27:24,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:24,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:24,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:24,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:24,539 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 3 states. [2021-10-11 02:27:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:24,565 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-10-11 02:27:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:24,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:27:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:24,570 INFO L225 Difference]: With dead ends: 41 [2021-10-11 02:27:24,571 INFO L226 Difference]: Without dead ends: 40 [2021-10-11 02:27:24,572 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 [2021-10-11 02:27:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-11 02:27:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-10-11 02:27:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-11 02:27:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-10-11 02:27:24,597 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2021-10-11 02:27:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:24,598 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-10-11 02:27:24,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-10-11 02:27:24,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:27:24,600 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:24,600 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:24,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:27:24,601 INFO L429 AbstractCegarLoop]: === Iteration 3 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:24,603 INFO L82 PathProgramCache]: Analyzing trace with hash -509849608, now seen corresponding path program 1 times [2021-10-11 02:27:24,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:24,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563579158] [2021-10-11 02:27:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:27:24,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563579158] [2021-10-11 02:27:24,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:24,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:27:24,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576667611] [2021-10-11 02:27:24,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:27:24,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:27:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:27:24,672 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2021-10-11 02:27:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:24,757 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2021-10-11 02:27:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:27:24,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2021-10-11 02:27:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:24,764 INFO L225 Difference]: With dead ends: 84 [2021-10-11 02:27:24,764 INFO L226 Difference]: Without dead ends: 53 [2021-10-11 02:27:24,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:27:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-11 02:27:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-10-11 02:27:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-11 02:27:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-11 02:27:24,776 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 16 [2021-10-11 02:27:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:24,777 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-11 02:27:24,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:27:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-11 02:27:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-11 02:27:24,777 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:24,778 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:24,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:27:24,778 INFO L429 AbstractCegarLoop]: === Iteration 4 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:24,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash -786790687, now seen corresponding path program 1 times [2021-10-11 02:27:24,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:24,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413927759] [2021-10-11 02:27:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-11 02:27:24,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413927759] [2021-10-11 02:27:24,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:24,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:24,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206570950] [2021-10-11 02:27:24,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:24,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:24,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:24,816 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 3 states. [2021-10-11 02:27:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:24,827 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-10-11 02:27:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:24,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2021-10-11 02:27:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:24,828 INFO L225 Difference]: With dead ends: 46 [2021-10-11 02:27:24,829 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 02:27:24,829 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 [2021-10-11 02:27:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 02:27:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-11 02:27:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-11 02:27:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-10-11 02:27:24,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2021-10-11 02:27:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:24,838 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-10-11 02:27:24,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-10-11 02:27:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 02:27:24,839 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:24,839 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:24,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:27:24,839 INFO L429 AbstractCegarLoop]: === Iteration 5 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:24,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:24,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1379292549, now seen corresponding path program 1 times [2021-10-11 02:27:24,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:24,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457476973] [2021-10-11 02:27:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-11 02:27:24,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457476973] [2021-10-11 02:27:24,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:24,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:24,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598757753] [2021-10-11 02:27:24,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:24,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:24,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:24,919 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 4 states. [2021-10-11 02:27:24,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:24,947 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-10-11 02:27:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:24,948 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-10-11 02:27:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:24,949 INFO L225 Difference]: With dead ends: 51 [2021-10-11 02:27:24,949 INFO L226 Difference]: Without dead ends: 50 [2021-10-11 02:27:24,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-11 02:27:24,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-11 02:27:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-10-11 02:27:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-10-11 02:27:24,959 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 25 [2021-10-11 02:27:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:24,959 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-10-11 02:27:24,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-10-11 02:27:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-11 02:27:24,961 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:24,966 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:24,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:27:24,967 INFO L429 AbstractCegarLoop]: === Iteration 6 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:27:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:24,968 INFO L82 PathProgramCache]: Analyzing trace with hash -483037003, now seen corresponding path program 1 times [2021-10-11 02:27:24,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:24,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128370726] [2021-10-11 02:27:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-11 02:27:25,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128370726] [2021-10-11 02:27:25,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:25,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 02:27:25,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637837998] [2021-10-11 02:27:25,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:27:25,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:25,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:27:25,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:27:25,097 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 8 states. [2021-10-11 02:27:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:25,244 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-11 02:27:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:27:25,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-10-11 02:27:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:25,248 INFO L225 Difference]: With dead ends: 64 [2021-10-11 02:27:25,248 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:27:25,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:27:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:27:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:27:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:27:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:27:25,257 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-10-11 02:27:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:25,258 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:27:25,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:27:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:27:25,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:27:25,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:27:25,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:27:25,415 INFO L262 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,415 INFO L262 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2021-10-11 02:27:25,415 INFO L262 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,415 INFO L262 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2021-10-11 02:27:25,416 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,416 INFO L265 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2021-10-11 02:27:25,416 INFO L262 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,416 INFO L262 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-10-11 02:27:25,416 INFO L258 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: (not (<= |rec1_#in~i| 0)) [2021-10-11 02:27:25,416 INFO L262 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,416 INFO L262 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,416 INFO L262 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,417 INFO L262 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,417 INFO L258 CegarLoopResult]: At program point L14-6(line 14) the Hoare annotation is: (not (<= |rec1_#in~i| 0)) [2021-10-11 02:27:25,417 INFO L262 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,417 INFO L262 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,417 INFO L262 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,417 INFO L262 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,417 INFO L258 CegarLoopResult]: At program point L14-8(line 14) the Hoare annotation is: (not (<= |rec1_#in~i| 0)) [2021-10-11 02:27:25,417 INFO L262 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,418 INFO L262 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,418 INFO L262 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2021-10-11 02:27:25,418 INFO L262 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,418 INFO L262 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2021-10-11 02:27:25,418 INFO L262 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2021-10-11 02:27:25,418 INFO L262 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,418 INFO L262 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,418 INFO L262 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2021-10-11 02:27:25,419 INFO L258 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (or (not (<= |rec2_#in~j| 2147483647)) (and (<= rec2_~j 2147483647) (<= 1 rec2_~j))) [2021-10-11 02:27:25,419 INFO L262 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,419 INFO L258 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (or (not (<= |rec2_#in~j| 2147483647)) (and (<= rec2_~j 2147483647) (<= 1 rec2_~j) (<= |rec2_#t~ret3| 0))) [2021-10-11 02:27:25,419 INFO L262 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,419 INFO L262 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,419 INFO L262 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,419 INFO L265 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2021-10-11 02:27:25,420 INFO L262 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,420 INFO L262 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,420 INFO L262 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:27:25,420 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:27:25,420 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:27:25,420 INFO L258 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2021-10-11 02:27:25,420 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-10-11 02:27:25,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:25 BoogieIcfgContainer [2021-10-11 02:27:25,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:25,429 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:25,429 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:25,429 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:25,429 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:23" (3/4) ... [2021-10-11 02:27:25,434 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:27:25,440 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2021-10-11 02:27:25,440 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2021-10-11 02:27:25,449 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 02:27:25,449 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:27:25,450 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:27:25,514 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbb3a62-56ab-4cf7-b7ec-f4374e9ae89e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:25,515 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:25,517 INFO L168 Benchmark]: Toolchain (without parser) took 2116.58 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 61.1 MB in the beginning and 67.6 MB in the end (delta: -6.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:25,517 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 96.5 MB. Free memory was 77.4 MB in the beginning and 77.3 MB in the end (delta: 61.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:25,518 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.56 ms. Allocated memory is still 96.5 MB. Free memory was 60.9 MB in the beginning and 75.3 MB in the end (delta: -14.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:25,519 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.25 ms. Allocated memory is still 96.5 MB. Free memory was 75.3 MB in the beginning and 74.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:25,519 INFO L168 Benchmark]: Boogie Preprocessor took 17.30 ms. Allocated memory is still 96.5 MB. Free memory was 74.1 MB in the beginning and 73.2 MB in the end (delta: 829.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:25,522 INFO L168 Benchmark]: RCFGBuilder took 313.22 ms. Allocated memory is still 96.5 MB. Free memory was 72.9 MB in the beginning and 59.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:25,529 INFO L168 Benchmark]: TraceAbstraction took 1439.69 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 70.3 MB in the end (delta: -11.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:25,529 INFO L168 Benchmark]: Witness Printer took 85.99 ms. Allocated memory is still 117.4 MB. Free memory was 70.3 MB in the beginning and 67.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:25,532 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 96.5 MB. Free memory was 77.4 MB in the beginning and 77.3 MB in the end (delta: 61.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 214.56 ms. Allocated memory is still 96.5 MB. Free memory was 60.9 MB in the beginning and 75.3 MB in the end (delta: -14.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.25 ms. Allocated memory is still 96.5 MB. Free memory was 75.3 MB in the beginning and 74.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.30 ms. Allocated memory is still 96.5 MB. Free memory was 74.1 MB in the beginning and 73.2 MB in the end (delta: 829.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 313.22 ms. Allocated memory is still 96.5 MB. Free memory was 72.9 MB in the beginning and 59.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1439.69 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 59.4 MB in the beginning and 70.3 MB in the end (delta: -11.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. * Witness Printer took 85.99 ms. Allocated memory is still 117.4 MB. Free memory was 70.3 MB in the beginning and 67.6 MB in the end (delta: 2.8 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: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: 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: 20]: 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: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 42 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 219 SDtfs, 52 SDslu, 489 SDs, 0 SdLazy, 125 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred 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, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 47 PreInvPairs, 51 NumberOfFragments, 44 HoareAnnotationTreeSize, 47 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 4058 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 35/35 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...