./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.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_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/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_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/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_a39f72f7-3595-4a0d-9680-15427181accc/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 85017c4a5a64f245bd703090448e8d5785d54b75 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:29:25,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:25,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:25,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:25,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:25,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:25,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:25,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:25,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:25,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:25,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:25,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:25,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:25,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:25,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:25,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:25,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:25,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:25,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:25,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:25,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:25,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:25,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:25,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:25,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:25,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:25,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:25,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:25,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:25,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:25,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:25,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:25,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:25,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:25,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:25,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:25,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:25,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:25,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:25,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:25,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:25,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-11 02:29:25,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:25,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:25,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:25,983 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:25,984 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:25,984 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:25,984 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:25,984 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:25,984 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:25,985 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:25,986 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:25,986 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:25,986 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:25,986 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:25,987 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:25,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:25,988 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:29:25,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:25,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:25,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:25,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:25,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:25,989 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-11 02:29:25,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:25,989 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:25,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:25,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:25,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:25,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:25,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:25,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:25,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:25,993 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:25,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:25,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:25,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:25,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:25,994 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_a39f72f7-3595-4a0d-9680-15427181accc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85017c4a5a64f245bd703090448e8d5785d54b75 [2021-10-11 02:29:26,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:26,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:26,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:26,347 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:26,351 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:26,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c [2021-10-11 02:29:26,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/data/ab2b3e649/fa599f931b744f0c8c6c985a8c4e9f3f/FLAG34a97f5e4 [2021-10-11 02:29:26,976 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:26,976 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c [2021-10-11 02:29:26,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/data/ab2b3e649/fa599f931b744f0c8c6c985a8c4e9f3f/FLAG34a97f5e4 [2021-10-11 02:29:27,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/data/ab2b3e649/fa599f931b744f0c8c6c985a8c4e9f3f [2021-10-11 02:29:27,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:27,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:27,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:27,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:27,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:27,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b251b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27, skipping insertion in model container [2021-10-11 02:29:27,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:27,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:27,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:27,595 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:27,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:27,620 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:27,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27 WrapperNode [2021-10-11 02:29:27,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:27,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:27,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:27,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:27,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:27,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:27,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:27,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:27,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,666 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... [2021-10-11 02:29:27,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:27,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:27,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:27,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:27,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/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 02:29:27,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:27,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:27,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:27,940 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:29:27,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:27 BoogieIcfgContainer [2021-10-11 02:29:27,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:27,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:27,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:27,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:27,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:27" (1/3) ... [2021-10-11 02:29:27,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a02385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:27, skipping insertion in model container [2021-10-11 02:29:27,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:27" (2/3) ... [2021-10-11 02:29:27,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a02385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:27, skipping insertion in model container [2021-10-11 02:29:27,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:27" (3/3) ... [2021-10-11 02:29:27,951 INFO L111 eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Introduction.c [2021-10-11 02:29:27,964 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:27,967 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2021-10-11 02:29:27,977 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-11 02:29:28,000 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:28,000 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:28,000 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:28,001 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:28,001 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:28,001 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:28,001 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:28,001 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:29:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:29:28,035 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:28,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:29:28,036 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2021-10-11 02:29:28,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:28,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898966285] [2021-10-11 02:29:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:28,289 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 02:29:28,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898966285] [2021-10-11 02:29:28,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:28,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:29:28,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027353970] [2021-10-11 02:29:28,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:28,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:28,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:28,321 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2021-10-11 02:29:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:28,436 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-10-11 02:29:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:28,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:29:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:28,448 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:29:28,448 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:29:28,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:29:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-11 02:29:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:29:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-11 02:29:28,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2021-10-11 02:29:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:28,501 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-11 02:29:28,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-11 02:29:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:29:28,502 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:28,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:29:28,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:29:28,504 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2021-10-11 02:29:28,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:28,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275984999] [2021-10-11 02:29:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:28,578 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 02:29:28,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275984999] [2021-10-11 02:29:28,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:28,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:28,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128981986] [2021-10-11 02:29:28,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:29:28,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:29:28,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:28,585 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2021-10-11 02:29:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:28,675 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-11 02:29:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:29:28,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:29:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:28,677 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:29:28,677 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:29:28,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:29:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-11 02:29:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:29:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-10-11 02:29:28,689 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2021-10-11 02:29:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:28,691 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-10-11 02:29:28,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:29:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-10-11 02:29:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:29:28,700 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:28,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:29:28,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:29:28,702 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:28,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2021-10-11 02:29:28,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:28,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153344926] [2021-10-11 02:29:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:28,757 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 02:29:28,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153344926] [2021-10-11 02:29:28,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:28,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:29:28,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137185247] [2021-10-11 02:29:28,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:29:28,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:28,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:29:28,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:28,759 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2021-10-11 02:29:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:28,786 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-11 02:29:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:29:28,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:29:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:28,788 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:29:28,795 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:29:28,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:29:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:29:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-11 02:29:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:29:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-11 02:29:28,802 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 6 [2021-10-11 02:29:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:28,802 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-11 02:29:28,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:29:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-11 02:29:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:29:28,803 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:28,803 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:28,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:29:28,805 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2021-10-11 02:29:28,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:28,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701770555] [2021-10-11 02:29:28,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:28,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701770555] [2021-10-11 02:29:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345867594] [2021-10-11 02:29:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/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 02:29:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:28,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:29:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:29,126 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 02:29:29,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:29,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:29:29,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2021-10-11 02:29:29,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517811679] [2021-10-11 02:29:29,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:29:29,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:29,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:29:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:29:29,172 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2021-10-11 02:29:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:29,218 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-11 02:29:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:29:29,219 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:29:29,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:29,219 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:29:29,220 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:29:29,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:29:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:29:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-11 02:29:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:29:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-11 02:29:29,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2021-10-11 02:29:29,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:29,224 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-11 02:29:29,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:29:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-11 02:29:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:29:29,225 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:29,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-11 02:29:29,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:29,444 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:29,444 INFO L82 PathProgramCache]: Analyzing trace with hash 720506461, now seen corresponding path program 1 times [2021-10-11 02:29:29,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:29,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226766451] [2021-10-11 02:29:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:29,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226766451] [2021-10-11 02:29:29,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69105798] [2021-10-11 02:29:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:29,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:29:29,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:29,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:29,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1557904618] [2021-10-11 02:29:29,650 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:29:29,650 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:29,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:29:29,660 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:29:29,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:29:29,936 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:29:30,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:29:30,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2021-10-11 02:29:30,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234256653] [2021-10-11 02:29:30,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:29:30,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:30,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:29:30,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:29:30,177 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2021-10-11 02:29:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:30,369 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-10-11 02:29:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:29:30,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-10-11 02:29:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:30,371 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:29:30,371 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:29:30,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:29:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:29:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:29:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:29:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-11 02:29:30,377 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-10-11 02:29:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:30,377 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-11 02:29:30,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:29:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-11 02:29:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:29:30,383 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:30,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2021-10-11 02:29:30,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:30,608 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2021-10-11 02:29:30,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:30,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735261654] [2021-10-11 02:29:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:30,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735261654] [2021-10-11 02:29:30,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690708271] [2021-10-11 02:29:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-11 02:29:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:30,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:29:30,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:30,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:30,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [519840130] [2021-10-11 02:29:30,724 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:29:30,724 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:30,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:29:30,725 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:29:30,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:29:30,866 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:29:31,083 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:31,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:29:31,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:29:31,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354110717] [2021-10-11 02:29:31,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:29:31,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:29:31,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:29:31,087 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2021-10-11 02:29:31,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:31,136 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-10-11 02:29:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:29:31,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-10-11 02:29:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:31,138 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:29:31,138 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 02:29:31,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:29:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 02:29:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-11 02:29:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 02:29:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-11 02:29:31,143 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 10 [2021-10-11 02:29:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:31,144 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-11 02:29:31,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:29:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-11 02:29:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 02:29:31,145 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:31,145 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2021-10-11 02:29:31,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-11 02:29:31,371 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:31,371 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2021-10-11 02:29:31,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:31,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276731988] [2021-10-11 02:29:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:31,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276731988] [2021-10-11 02:29:31,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383280551] [2021-10-11 02:29:31,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:31,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-11 02:29:31,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:29:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:29:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:31,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:31,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087840157] [2021-10-11 02:29:31,644 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:29:31,644 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:31,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:29:31,648 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:29:31,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:29:31,771 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:29:32,061 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:32,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:29:32,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-10-11 02:29:32,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512283610] [2021-10-11 02:29:32,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:29:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:29:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:29:32,064 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2021-10-11 02:29:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:32,163 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-10-11 02:29:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:29:32,163 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-10-11 02:29:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:32,165 INFO L225 Difference]: With dead ends: 57 [2021-10-11 02:29:32,165 INFO L226 Difference]: Without dead ends: 56 [2021-10-11 02:29:32,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:29:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-11 02:29:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-11 02:29:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-10-11 02:29:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-10-11 02:29:32,175 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 25 [2021-10-11 02:29:32,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:32,176 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-10-11 02:29:32,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:29:32,176 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-10-11 02:29:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-11 02:29:32,177 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:32,178 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2021-10-11 02:29:32,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:32,404 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2021-10-11 02:29:32,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:32,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975167158] [2021-10-11 02:29:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:32,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975167158] [2021-10-11 02:29:32,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673164342] [2021-10-11 02:29:32,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:32,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:29:32,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:29:32,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:29:32,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:32,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:33,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728937797] [2021-10-11 02:29:33,069 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:29:33,069 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:33,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:29:33,069 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:29:33,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:29:33,152 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:29:33,616 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:33,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:29:33,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-10-11 02:29:33,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176445436] [2021-10-11 02:29:33,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-10-11 02:29:33,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:33,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-11 02:29:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:29:33,619 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 24 states. [2021-10-11 02:29:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:33,843 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2021-10-11 02:29:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-11 02:29:33,844 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2021-10-11 02:29:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:33,850 INFO L225 Difference]: With dead ends: 117 [2021-10-11 02:29:33,851 INFO L226 Difference]: Without dead ends: 116 [2021-10-11 02:29:33,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:29:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-11 02:29:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-11 02:29:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-10-11 02:29:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2021-10-11 02:29:33,881 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 55 [2021-10-11 02:29:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:33,882 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2021-10-11 02:29:33,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-10-11 02:29:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2021-10-11 02:29:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-11 02:29:33,886 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:33,887 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1] [2021-10-11 02:29:34,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-11 02:29:34,099 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:34,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1393971939, now seen corresponding path program 4 times [2021-10-11 02:29:34,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:34,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293271755] [2021-10-11 02:29:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:34,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293271755] [2021-10-11 02:29:34,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690750138] [2021-10-11 02:29:34,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 02:29:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:34,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:36,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [819494166] [2021-10-11 02:29:36,153 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:29:36,153 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:36,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:29:36,154 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:29:36,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:29:36,225 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:29:37,091 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:37,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:29:37,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2021-10-11 02:29:37,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466440106] [2021-10-11 02:29:37,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-10-11 02:29:37,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-11 02:29:37,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2021-10-11 02:29:37,095 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 48 states. [2021-10-11 02:29:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:37,462 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2021-10-11 02:29:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-11 02:29:37,463 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 115 [2021-10-11 02:29:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:37,465 INFO L225 Difference]: With dead ends: 237 [2021-10-11 02:29:37,465 INFO L226 Difference]: Without dead ends: 236 [2021-10-11 02:29:37,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 292 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2021-10-11 02:29:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-11 02:29:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-10-11 02:29:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2021-10-11 02:29:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2021-10-11 02:29:37,482 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 115 [2021-10-11 02:29:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:37,483 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2021-10-11 02:29:37,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-10-11 02:29:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2021-10-11 02:29:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-10-11 02:29:37,486 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:37,487 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1] [2021-10-11 02:29:37,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:37,711 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:29:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:37,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1923709923, now seen corresponding path program 5 times [2021-10-11 02:29:37,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:37,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729195660] [2021-10-11 02:29:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:39,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729195660] [2021-10-11 02:29:39,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261511886] [2021-10-11 02:29:39,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:39,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-11 02:29:39,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:29:39,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:29:39,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2021-10-11 02:29:39,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2021-10-11 02:29:40,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [994482519] [2021-10-11 02:29:40,560 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:29:40,560 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:40,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:29:40,561 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:29:40,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:29:40,643 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:29:44,153 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:44,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:29:44,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 8, 8] total 62 [2021-10-11 02:29:44,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808298432] [2021-10-11 02:29:44,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-10-11 02:29:44,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:44,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-11 02:29:44,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=2999, Unknown=0, NotChecked=0, Total=4556 [2021-10-11 02:29:44,158 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 63 states. [2021-10-11 02:29:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:52,615 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2021-10-11 02:29:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-10-11 02:29:52,615 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 235 [2021-10-11 02:29:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:52,617 INFO L225 Difference]: With dead ends: 243 [2021-10-11 02:29:52,617 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:29:52,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 637 SyntacticMatches, 47 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16599 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=12643, Invalid=32089, Unknown=0, NotChecked=0, Total=44732 [2021-10-11 02:29:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:29:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:29:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:29:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:29:52,634 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 235 [2021-10-11 02:29:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:52,634 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:29:52,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-10-11 02:29:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:29:52,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:29:52,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:52,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:29:52,958 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 209 [2021-10-11 02:29:53,300 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 24 [2021-10-11 02:29:53,303 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2021-10-11 02:29:53,303 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:29:53,303 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:29:53,303 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-11 02:29:53,303 INFO L262 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-10-11 02:29:53,304 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2021-10-11 02:29:53,304 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:29:53,304 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:29:53,304 INFO L262 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2021-10-11 02:29:53,304 INFO L262 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2021-10-11 02:29:53,305 INFO L258 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~y~0 (+ (div (+ (* ULTIMATE.start_main_~x~0 (- 1)) 2147483648) 2) 1)) (<= 2 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 2147483646)) (and (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648)) (<= (+ ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) 2147483648) (= ULTIMATE.start_main_~y~0 1))) [2021-10-11 02:29:53,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:53 BoogieIcfgContainer [2021-10-11 02:29:53,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:53,320 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:53,320 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:53,321 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:53,321 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:27" (3/4) ... [2021-10-11 02:29:53,324 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:29:53,332 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 02:29:53,332 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:29:53,333 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:29:53,361 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a39f72f7-3595-4a0d-9680-15427181accc/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:29:53,361 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:53,362 INFO L168 Benchmark]: Toolchain (without parser) took 25998.25 ms. Allocated memory was 127.9 MB in the beginning and 270.5 MB in the end (delta: 142.6 MB). Free memory was 98.3 MB in the beginning and 152.5 MB in the end (delta: -54.2 MB). Peak memory consumption was 87.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:53,363 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 83.9 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:53,363 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.15 ms. Allocated memory is still 127.9 MB. Free memory was 98.0 MB in the beginning and 106.4 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:53,363 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.65 ms. Allocated memory is still 127.9 MB. Free memory was 106.4 MB in the beginning and 105.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:53,364 INFO L168 Benchmark]: Boogie Preprocessor took 15.33 ms. Allocated memory is still 127.9 MB. Free memory was 105.3 MB in the beginning and 104.3 MB in the end (delta: 982.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:53,364 INFO L168 Benchmark]: RCFGBuilder took 273.34 ms. Allocated memory is still 127.9 MB. Free memory was 104.3 MB in the beginning and 93.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:53,365 INFO L168 Benchmark]: TraceAbstraction took 25376.27 ms. Allocated memory was 127.9 MB in the beginning and 270.5 MB in the end (delta: 142.6 MB). Free memory was 93.5 MB in the beginning and 154.6 MB in the end (delta: -61.1 MB). Peak memory consumption was 82.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:53,365 INFO L168 Benchmark]: Witness Printer took 41.09 ms. Allocated memory is still 270.5 MB. Free memory was 154.6 MB in the beginning and 152.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:53,367 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 83.9 MB. Free memory is still 40.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.15 ms. Allocated memory is still 127.9 MB. Free memory was 98.0 MB in the beginning and 106.4 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.65 ms. Allocated memory is still 127.9 MB. Free memory was 106.4 MB in the beginning and 105.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.33 ms. Allocated memory is still 127.9 MB. Free memory was 105.3 MB in the beginning and 104.3 MB in the end (delta: 982.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 273.34 ms. Allocated memory is still 127.9 MB. Free memory was 104.3 MB in the beginning and 93.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25376.27 ms. Allocated memory was 127.9 MB in the beginning and 270.5 MB in the end (delta: 142.6 MB). Free memory was 93.5 MB in the beginning and 154.6 MB in the end (delta: -61.1 MB). Peak memory consumption was 82.2 MB. Max. memory is 16.1 GB. * Witness Printer took 41.09 ms. Allocated memory is still 270.5 MB. Free memory was 154.6 MB in the beginning and 152.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: 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: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((y <= (x * -1 + 2147483648) / 2 + 1 && 2 <= y) && y <= 2147483646) || ((0 <= x + 2147483648 && x + y <= 2147483648) && y == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.8s, OverallIterations: 10, TraceHistogramMax: 47, AutomataDifference: 9.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 381 SDslu, 83 SDs, 0 SdLazy, 699 SolverSat, 219 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1164 SyntacticMatches, 91 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19286 ImplicationChecksByTransitivity, 17.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred in iteration=9, 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, 10 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 49 NumberOfFragments, 33 HoareAnnotationTreeSize, 1 FomulaSimplifications, 367 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 1884 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 927 NumberOfCodeBlocks, 717 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1360 ConstructedInterpolants, 0 QuantifiedInterpolants, 455092 SizeOfPredicates, 4 NumberOfNonLiveVariables, 478 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 10678/20766 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: OVERALL_TIME[ms]: 287, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 24, TOOLS_POST_TIME[ms]: 38, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 24, TOOLS_QUANTIFIERELIM_TIME[ms]: 30, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 5, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 39, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 90, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 86, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 6, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 8, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 119, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 119, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 5, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 11, DAG_COMPRESSION_PROCESSED_NODES: 75, DAG_COMPRESSION_RETAINED_NODES: 27, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...