./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.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_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/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_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/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_87eaf521-b832-4288-867a-e5c77d30a1a5/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 871be16186d4378aec884efd2352a47ca4eb57bc ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:29:02,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:02,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:02,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:02,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:02,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:02,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:02,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:02,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:02,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:02,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:02,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:02,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:02,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:02,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:02,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:02,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:02,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:02,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:02,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:02,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:02,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:02,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:02,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:02,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:02,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:02,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:02,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:02,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:02,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:02,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:02,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:02,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:02,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:02,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:02,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:02,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:02,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:02,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:02,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:02,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:02,506 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-11 02:29:02,553 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:02,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:02,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:02,554 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:02,555 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:02,555 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:02,555 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:02,555 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:02,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:02,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:02,556 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:02,556 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:02,556 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:02,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:02,556 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:02,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:02,558 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:29:02,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:02,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:02,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:02,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:02,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:02,559 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-11 02:29:02,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:02,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:02,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:02,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:02,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:02,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:02,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:02,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:02,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:02,566 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:02,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:02,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:02,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:02,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:02,568 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_87eaf521-b832-4288-867a-e5c77d30a1a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 871be16186d4378aec884efd2352a47ca4eb57bc [2021-10-11 02:29:02,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:02,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:02,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:02,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:02,932 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:02,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2021-10-11 02:29:03,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/data/73968c5dc/c89ea763e8e34eb3b596325d560a7482/FLAGb0128c1b6 [2021-10-11 02:29:03,730 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:03,731 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2021-10-11 02:29:03,748 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/data/73968c5dc/c89ea763e8e34eb3b596325d560a7482/FLAGb0128c1b6 [2021-10-11 02:29:03,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/data/73968c5dc/c89ea763e8e34eb3b596325d560a7482 [2021-10-11 02:29:03,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:03,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:03,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:03,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:03,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:03,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:03" (1/1) ... [2021-10-11 02:29:03,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e50fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:03, skipping insertion in model container [2021-10-11 02:29:03,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:03" (1/1) ... [2021-10-11 02:29:03,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:03,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:04,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:04,124 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:04,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:04,153 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:04,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04 WrapperNode [2021-10-11 02:29:04,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:04,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:04,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:04,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:04,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:04,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:04,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:04,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:04,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:04,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:04,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:04,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:04,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/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 02:29:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:04,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:04,319 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2021-10-11 02:29:04,319 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2021-10-11 02:29:04,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:04,608 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-11 02:29:04,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:04 BoogieIcfgContainer [2021-10-11 02:29:04,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:04,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:04,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:04,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:04,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:03" (1/3) ... [2021-10-11 02:29:04,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5d793a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:04, skipping insertion in model container [2021-10-11 02:29:04,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (2/3) ... [2021-10-11 02:29:04,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5d793a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:04, skipping insertion in model container [2021-10-11 02:29:04,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:04" (3/3) ... [2021-10-11 02:29:04,625 INFO L111 eAbstractionObserver]: Analyzing ICFG McCarthy91_Recursion.c [2021-10-11 02:29:04,642 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:04,645 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2021-10-11 02:29:04,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-11 02:29:04,699 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:04,701 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:04,701 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:04,701 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:04,702 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:04,702 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:04,702 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:04,702 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-10-11 02:29:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:29:04,735 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:04,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:29:04,736 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:04,744 INFO L82 PathProgramCache]: Analyzing trace with hash 30304495, now seen corresponding path program 1 times [2021-10-11 02:29:04,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:04,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99155511] [2021-10-11 02:29:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:05,063 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 02:29:05,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99155511] [2021-10-11 02:29:05,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:05,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:29:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454798624] [2021-10-11 02:29:05,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:29:05,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:05,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:29:05,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:05,118 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2021-10-11 02:29:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:05,338 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-10-11 02:29:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:29:05,344 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2021-10-11 02:29:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:05,356 INFO L225 Difference]: With dead ends: 38 [2021-10-11 02:29:05,356 INFO L226 Difference]: Without dead ends: 32 [2021-10-11 02:29:05,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:29:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-11 02:29:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-10-11 02:29:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:29:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-10-11 02:29:05,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 5 [2021-10-11 02:29:05,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:05,458 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-10-11 02:29:05,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:29:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-10-11 02:29:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:29:05,459 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:05,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:29:05,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:29:05,461 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash 30304655, now seen corresponding path program 1 times [2021-10-11 02:29:05,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:05,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129692376] [2021-10-11 02:29:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:05,499 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 02:29:05,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129692376] [2021-10-11 02:29:05,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:05,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:05,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406403035] [2021-10-11 02:29:05,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:05,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:05,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:05,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:05,504 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2021-10-11 02:29:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:05,531 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-10-11 02:29:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:05,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-10-11 02:29:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:05,533 INFO L225 Difference]: With dead ends: 29 [2021-10-11 02:29:05,533 INFO L226 Difference]: Without dead ends: 28 [2021-10-11 02:29:05,535 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 02:29:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-11 02:29:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-10-11 02:29:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 02:29:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-10-11 02:29:05,545 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 5 [2021-10-11 02:29:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:05,545 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-10-11 02:29:05,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-10-11 02:29:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:29:05,546 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:05,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:29:05,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:29:05,547 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:05,548 INFO L82 PathProgramCache]: Analyzing trace with hash 939439389, now seen corresponding path program 1 times [2021-10-11 02:29:05,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:05,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540102189] [2021-10-11 02:29:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:05,571 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 02:29:05,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540102189] [2021-10-11 02:29:05,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:05,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:05,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2162685] [2021-10-11 02:29:05,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:05,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:05,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:05,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:05,575 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2021-10-11 02:29:05,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:05,598 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2021-10-11 02:29:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:05,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:29:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:05,600 INFO L225 Difference]: With dead ends: 28 [2021-10-11 02:29:05,601 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:29:05,602 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 02:29:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:29:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-10-11 02:29:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:29:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-11 02:29:05,611 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 6 [2021-10-11 02:29:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:05,611 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-11 02:29:05,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-11 02:29:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:29:05,612 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:05,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:29:05,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:29:05,613 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:05,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:05,614 INFO L82 PathProgramCache]: Analyzing trace with hash 939444354, now seen corresponding path program 1 times [2021-10-11 02:29:05,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:05,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147123599] [2021-10-11 02:29:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:05,659 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 02:29:05,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147123599] [2021-10-11 02:29:05,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:05,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:29:05,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313286821] [2021-10-11 02:29:05,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:29:05,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:05,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:29:05,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:05,663 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2021-10-11 02:29:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:05,768 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-10-11 02:29:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:29:05,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-10-11 02:29:05,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:05,770 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:29:05,770 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:29:05,771 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 02:29:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:29:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-10-11 02:29:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-10-11 02:29:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-10-11 02:29:05,787 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 6 [2021-10-11 02:29:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:05,787 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-10-11 02:29:05,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:29:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-10-11 02:29:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:29:05,788 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:05,788 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:05,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:29:05,789 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:05,790 INFO L82 PathProgramCache]: Analyzing trace with hash 312291472, now seen corresponding path program 1 times [2021-10-11 02:29:05,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:05,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520937468] [2021-10-11 02:29:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:05,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520937468] [2021-10-11 02:29:05,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:05,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:29:05,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853357940] [2021-10-11 02:29:05,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:29:05,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:05,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:29:05,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:05,871 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2021-10-11 02:29:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:06,026 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-10-11 02:29:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:29:06,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-10-11 02:29:06,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:06,035 INFO L225 Difference]: With dead ends: 55 [2021-10-11 02:29:06,035 INFO L226 Difference]: Without dead ends: 54 [2021-10-11 02:29:06,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:29:06,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-11 02:29:06,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2021-10-11 02:29:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-10-11 02:29:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-10-11 02:29:06,065 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 10 [2021-10-11 02:29:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:06,066 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-10-11 02:29:06,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:29:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-10-11 02:29:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:29:06,067 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:06,067 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:06,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:29:06,068 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash -904725729, now seen corresponding path program 1 times [2021-10-11 02:29:06,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:06,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336568094] [2021-10-11 02:29:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:29:06,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336568094] [2021-10-11 02:29:06,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321953801] [2021-10-11 02:29:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:29:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 02:29:06,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:06,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:06,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749535519] [2021-10-11 02:29:06,913 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-10-11 02:29:06,914 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:06,926 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-11 02:29:06,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:29:06,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2021-10-11 02:29:06,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662300476] [2021-10-11 02:29:06,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-10-11 02:29:06,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:06,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-11 02:29:06,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:29:06,935 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 22 states. [2021-10-11 02:29:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:07,825 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2021-10-11 02:29:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-11 02:29:07,826 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 18 [2021-10-11 02:29:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:07,834 INFO L225 Difference]: With dead ends: 83 [2021-10-11 02:29:07,841 INFO L226 Difference]: Without dead ends: 82 [2021-10-11 02:29:07,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2021-10-11 02:29:07,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-11 02:29:07,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2021-10-11 02:29:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-11 02:29:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-10-11 02:29:07,867 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2021-10-11 02:29:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:07,868 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-10-11 02:29:07,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-10-11 02:29:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-10-11 02:29:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:29:07,869 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:07,870 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:08,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-11 02:29:08,091 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:08,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2018278482, now seen corresponding path program 1 times [2021-10-11 02:29:08,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:08,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003427690] [2021-10-11 02:29:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:29:08,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003427690] [2021-10-11 02:29:08,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:08,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:29:08,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413051098] [2021-10-11 02:29:08,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:29:08,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:29:08,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:29:08,161 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2021-10-11 02:29:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:08,337 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-10-11 02:29:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-11 02:29:08,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-10-11 02:29:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:08,339 INFO L225 Difference]: With dead ends: 98 [2021-10-11 02:29:08,339 INFO L226 Difference]: Without dead ends: 97 [2021-10-11 02:29:08,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:29:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-11 02:29:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2021-10-11 02:29:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-10-11 02:29:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2021-10-11 02:29:08,357 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 19 [2021-10-11 02:29:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:08,357 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2021-10-11 02:29:08,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:29:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2021-10-11 02:29:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-11 02:29:08,360 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:08,360 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-11 02:29:08,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:29:08,360 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1310326519, now seen corresponding path program 1 times [2021-10-11 02:29:08,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:08,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350322472] [2021-10-11 02:29:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-11 02:29:08,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350322472] [2021-10-11 02:29:08,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:08,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 02:29:08,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998692044] [2021-10-11 02:29:08,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:29:08,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:08,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:29:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:29:08,491 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand 8 states. [2021-10-11 02:29:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:08,716 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2021-10-11 02:29:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-11 02:29:08,716 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2021-10-11 02:29:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:08,717 INFO L225 Difference]: With dead ends: 92 [2021-10-11 02:29:08,717 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:29:08,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:29:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:29:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:29:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:29:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:29:08,721 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-10-11 02:29:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:08,721 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:29:08,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:29:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:29:08,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:29:08,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:29:08,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:29:09,260 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-10-11 02:29:09,264 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:29:09,265 INFO L258 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2147483647) (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648))) [2021-10-11 02:29:09,265 INFO L262 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2021-10-11 02:29:09,265 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:29:09,265 INFO L262 CegarLoopResult]: For program point mc91Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 11) no Hoare annotation was computed. [2021-10-11 02:29:09,265 INFO L262 CegarLoopResult]: For program point mc91FINAL(lines 8 12) no Hoare annotation was computed. [2021-10-11 02:29:09,265 INFO L262 CegarLoopResult]: For program point mc91Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 11) no Hoare annotation was computed. [2021-10-11 02:29:09,266 INFO L262 CegarLoopResult]: For program point mc91Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2021-10-11 02:29:09,266 INFO L262 CegarLoopResult]: For program point mc91Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 10) no Hoare annotation was computed. [2021-10-11 02:29:09,266 INFO L262 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2021-10-11 02:29:09,266 INFO L262 CegarLoopResult]: For program point L10(lines 10 11) no Hoare annotation was computed. [2021-10-11 02:29:09,266 INFO L262 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-10-11 02:29:09,267 INFO L262 CegarLoopResult]: For program point L10-1(line 10) no Hoare annotation was computed. [2021-10-11 02:29:09,267 INFO L258 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (or (not (<= 0 (+ |mc91_#in~n| 2147483648))) (and (<= mc91_~n |mc91_#in~n|) (<= 0 (+ mc91_~n 2147483648))) (not (<= |mc91_#in~n| 111))) (or (not (<= |mc91_#in~n| 2147483648)) (and (<= mc91_~n 100) (<= 91 mc91_~n)) (not (<= 91 |mc91_#in~n|)))) [2021-10-11 02:29:09,267 INFO L262 CegarLoopResult]: For program point L10-2(line 10) no Hoare annotation was computed. [2021-10-11 02:29:09,268 INFO L262 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2021-10-11 02:29:09,269 INFO L258 CegarLoopResult]: At program point L11-4(line 11) the Hoare annotation is: (let ((.cse0 (<= |mc91_#t~ret0| 2147483648)) (.cse1 (<= 91 |mc91_#t~ret0|))) (and (or (and (<= mc91_~n 100) .cse0 .cse1 (<= 91 mc91_~n)) (not (<= |mc91_#in~n| 2147483648)) (not (<= 91 |mc91_#in~n|))) (or (and (<= mc91_~n |mc91_#in~n|) .cse0 (<= 0 (+ mc91_~n 2147483648)) .cse1) (not (<= 0 (+ |mc91_#in~n| 2147483648))) (not (<= |mc91_#in~n| 111))))) [2021-10-11 02:29:09,269 INFO L265 CegarLoopResult]: At program point mc91ENTRY(lines 8 12) the Hoare annotation is: true [2021-10-11 02:29:09,269 INFO L262 CegarLoopResult]: For program point L11-5(line 11) no Hoare annotation was computed. [2021-10-11 02:29:09,269 INFO L262 CegarLoopResult]: For program point mc91EXIT(lines 8 12) no Hoare annotation was computed. [2021-10-11 02:29:09,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:09 BoogieIcfgContainer [2021-10-11 02:29:09,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:09,279 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:09,279 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:09,279 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:09,280 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:04" (3/4) ... [2021-10-11 02:29:09,282 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:29:09,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure mc91 [2021-10-11 02:29:09,294 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 02:29:09,294 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:29:09,295 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:29:09,335 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87eaf521-b832-4288-867a-e5c77d30a1a5/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:29:09,335 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:09,337 INFO L168 Benchmark]: Toolchain (without parser) took 5560.62 ms. Allocated memory was 115.3 MB in the beginning and 159.4 MB in the end (delta: 44.0 MB). Free memory was 83.3 MB in the beginning and 51.9 MB in the end (delta: 31.5 MB). Peak memory consumption was 75.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:09,337 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 75.5 MB. Free memory is still 32.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:09,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.60 ms. Allocated memory is still 115.3 MB. Free memory was 83.3 MB in the beginning and 91.1 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:09,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.54 ms. Allocated memory is still 115.3 MB. Free memory was 91.1 MB in the beginning and 89.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:09,338 INFO L168 Benchmark]: Boogie Preprocessor took 24.05 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 89.0 MB in the end (delta: 905.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:09,339 INFO L168 Benchmark]: RCFGBuilder took 399.65 ms. Allocated memory is still 115.3 MB. Free memory was 89.0 MB in the beginning and 78.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:09,339 INFO L168 Benchmark]: TraceAbstraction took 4663.81 ms. Allocated memory was 115.3 MB in the beginning and 159.4 MB in the end (delta: 44.0 MB). Free memory was 78.1 MB in the beginning and 54.0 MB in the end (delta: 24.2 MB). Peak memory consumption was 70.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:09,339 INFO L168 Benchmark]: Witness Printer took 56.65 ms. Allocated memory is still 159.4 MB. Free memory was 54.0 MB in the beginning and 51.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:09,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 75.5 MB. Free memory is still 32.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 376.60 ms. Allocated memory is still 115.3 MB. Free memory was 83.3 MB in the beginning and 91.1 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.54 ms. Allocated memory is still 115.3 MB. Free memory was 91.1 MB in the beginning and 89.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.05 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 89.0 MB in the end (delta: 905.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 399.65 ms. Allocated memory is still 115.3 MB. Free memory was 89.0 MB in the beginning and 78.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4663.81 ms. Allocated memory was 115.3 MB in the beginning and 159.4 MB in the end (delta: 44.0 MB). Free memory was 78.1 MB in the beginning and 54.0 MB in the end (delta: 24.2 MB). Peak memory consumption was 70.6 MB. Max. memory is 16.1 GB. * Witness Printer took 56.65 ms. Allocated memory is still 159.4 MB. Free memory was 54.0 MB in the beginning and 51.9 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: 10]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 11]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 11]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 10]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 8, TraceHistogramMax: 7, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 260 SDslu, 234 SDs, 0 SdLazy, 530 SolverSat, 170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 64 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 58 PreInvPairs, 58 NumberOfFragments, 96 HoareAnnotationTreeSize, 58 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 4 FomulaSimplificationsInter, 371 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 7068 SizeOfPredicates, 4 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 97/109 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...