./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:42:54,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:42:54,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:42:54,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:42:54,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:42:54,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:42:54,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:42:54,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:42:54,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:42:54,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:42:54,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:42:54,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:42:54,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:42:54,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:42:54,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:42:54,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:42:54,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:42:54,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:42:54,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:42:54,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:42:54,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:42:54,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:42:54,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:42:54,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:42:54,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:42:54,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:42:54,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:42:54,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:42:54,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:42:54,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:42:54,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:42:54,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:42:54,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:42:54,842 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:42:54,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:42:54,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:42:54,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:42:54,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:42:54,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:42:54,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:42:54,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:42:54,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:42:54,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:42:54,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:42:54,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:42:54,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:42:54,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:42:54,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:42:54,907 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:42:54,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:42:54,908 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:42:54,908 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:42:54,909 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:42:54,909 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:42:54,910 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:42:54,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:42:54,910 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:42:54,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:42:54,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:42:54,911 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:42:54,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:42:54,912 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:42:54,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:42:54,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:42:54,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:42:54,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:42:54,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:42:54,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:42:54,915 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:42:54,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:42:54,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:42:54,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:42:54,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:42:54,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:42:54,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:42:54,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:42:54,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:42:54,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:42:54,918 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:42:54,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:42:54,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:42:54,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:42:54,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:42:54,919 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_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 [2021-11-21 00:42:55,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:42:55,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:42:55,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:42:55,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:42:55,298 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:42:55,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2021-11-21 00:42:55,391 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/data/9a9297e51/2fef65fa952147debcc60130667016eb/FLAG796d24a28 [2021-11-21 00:42:55,971 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:42:55,976 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2021-11-21 00:42:55,991 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/data/9a9297e51/2fef65fa952147debcc60130667016eb/FLAG796d24a28 [2021-11-21 00:42:56,300 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/data/9a9297e51/2fef65fa952147debcc60130667016eb [2021-11-21 00:42:56,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:42:56,307 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:42:56,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:42:56,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:42:56,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:42:56,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c84eab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56, skipping insertion in model container [2021-11-21 00:42:56,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:42:56,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:42:56,576 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2021-11-21 00:42:56,610 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2021-11-21 00:42:56,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:42:56,621 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:42:56,639 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2021-11-21 00:42:56,664 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2021-11-21 00:42:56,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:42:56,690 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:42:56,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56 WrapperNode [2021-11-21 00:42:56,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:42:56,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:42:56,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:42:56,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:42:56,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,738 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2021-11-21 00:42:56,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:42:56,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:42:56,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:42:56,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:42:56,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:42:56,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:42:56,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:42:56,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:42:56,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (1/1) ... [2021-11-21 00:42:56,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:42:56,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:56,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:42:56,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:42:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:42:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-21 00:42:56,882 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-21 00:42:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-21 00:42:56,882 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-21 00:42:56,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:42:56,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:42:56,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:42:56,979 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:42:56,981 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:42:57,273 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:42:57,415 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:42:57,416 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:42:57,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:57 BoogieIcfgContainer [2021-11-21 00:42:57,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:42:57,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:42:57,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:42:57,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:42:57,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:42:56" (1/3) ... [2021-11-21 00:42:57,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27467ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:42:57, skipping insertion in model container [2021-11-21 00:42:57,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:42:56" (2/3) ... [2021-11-21 00:42:57,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27467ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:42:57, skipping insertion in model container [2021-11-21 00:42:57,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:42:57" (3/3) ... [2021-11-21 00:42:57,435 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_8.i [2021-11-21 00:42:57,441 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:42:57,442 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 00:42:57,502 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:42:57,511 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:42:57,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 00:42:57,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:42:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:42:57,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:57,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:42:57,538 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash -391407110, now seen corresponding path program 1 times [2021-11-21 00:42:57,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:57,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207970090] [2021-11-21 00:42:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:57,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:57,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:57,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279598409] [2021-11-21 00:42:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:57,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:57,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:57,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:57,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:42:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:57,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:42:57,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:57,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:42:57,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:57,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207970090] [2021-11-21 00:42:57,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:57,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279598409] [2021-11-21 00:42:57,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279598409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:57,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:57,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:42:57,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298185775] [2021-11-21 00:42:57,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:57,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:57,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:57,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:57,961 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:58,013 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-21 00:42:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:42:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:58,023 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:42:58,023 INFO L226 Difference]: Without dead ends: 24 [2021-11-21 00:42:58,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:58,030 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:58,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:42:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-21 00:42:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-21 00:42:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:42:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-21 00:42:58,074 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2021-11-21 00:42:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:58,094 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-21 00:42:58,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:42:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-21 00:42:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:42:58,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:58,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:58,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:58,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:42:58,322 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash 749024068, now seen corresponding path program 1 times [2021-11-21 00:42:58,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:58,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372742386] [2021-11-21 00:42:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:58,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:58,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:58,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854064358] [2021-11-21 00:42:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:58,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:58,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:58,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:58,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:42:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:42:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:58,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:42:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:42:58,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:58,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372742386] [2021-11-21 00:42:58,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:58,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854064358] [2021-11-21 00:42:58,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854064358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:42:58,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640010842] [2021-11-21 00:42:58,592 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:42:58,592 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:42:58,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:42:58,603 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:42:58,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:43:15,678 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:43:15,934 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:43:15,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:43:15,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-21 00:43:15,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780345408] [2021-11-21 00:43:15,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:43:15,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:43:15,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:15,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:43:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:43:15,939 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:16,034 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-21 00:43:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:43:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:43:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:16,036 INFO L225 Difference]: With dead ends: 28 [2021-11-21 00:43:16,036 INFO L226 Difference]: Without dead ends: 25 [2021-11-21 00:43:16,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:43:16,039 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:16,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:43:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-21 00:43:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-21 00:43:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:43:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-21 00:43:16,048 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2021-11-21 00:43:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:16,049 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-21 00:43:16,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:43:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-21 00:43:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:43:16,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:16,051 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:16,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:16,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:16,276 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1742652218, now seen corresponding path program 2 times [2021-11-21 00:43:16,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:16,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885441337] [2021-11-21 00:43:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:16,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:16,301 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:43:16,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685648378] [2021-11-21 00:43:16,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:43:16,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:43:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:43:16,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:43:16,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:43:32,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:43:32,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:43:32,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-21 00:43:32,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:45:29,381 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (< |ULTIMATE.start_main1_~x~0#1| 0) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)))) is different from false [2021-11-21 00:46:34,782 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_main1_~x~0#1| Int)) (let ((.cse0 (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (< |ULTIMATE.start_main1_~x~0#1| 0) (not (= .cse0 0)) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |ULTIMATE.start_main1_~y~0#1|) 0)))) is different from false [2021-11-21 00:46:36,789 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_main1_~x~0#1| Int)) (let ((.cse0 (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (< |ULTIMATE.start_main1_~x~0#1| 0) (not (= .cse0 0)) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |ULTIMATE.start_main1_~y~0#1|) 0)))) is different from true [2021-11-21 00:47:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-21 00:47:16,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:48:45,307 WARN L227 SmtUtils]: Spent 54.30s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:49:46,834 WARN L227 SmtUtils]: Spent 29.22s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:50:24,500 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 7 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:51:08,126 WARN L227 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 7 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:51:12,187 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_12| Int) (|v_ULTIMATE.start_main1_~x~0#1_7| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_7| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_12|) 256))) (or (<= 0 |v_ULTIMATE.start_main1_~x~0#1_7|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_7|) 0) (= .cse0 0) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_12| .cse0) 256) 0)) (<= |v_ULTIMATE.start_main1_~y~0#1_12| 0) (not (= (mod |v_ULTIMATE.start_main1_~x~0#1_7| |v_ULTIMATE.start_main1_~y~0#1_12|) 0))))) is different from false [2021-11-21 00:51:14,190 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_12| Int) (|v_ULTIMATE.start_main1_~x~0#1_7| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_7| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_12|) 256))) (or (<= 0 |v_ULTIMATE.start_main1_~x~0#1_7|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_7|) 0) (= .cse0 0) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_12| .cse0) 256) 0)) (<= |v_ULTIMATE.start_main1_~y~0#1_12| 0) (not (= (mod |v_ULTIMATE.start_main1_~x~0#1_7| |v_ULTIMATE.start_main1_~y~0#1_12|) 0))))) is different from true [2021-11-21 00:51:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:51:14,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885441337] [2021-11-21 00:51:14,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:51:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685648378] [2021-11-21 00:51:14,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685648378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:51:14,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653804764] [2021-11-21 00:51:14,194 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:51:14,194 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:51:14,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:51:14,195 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:51:14,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:51:30,103 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:51:53,209 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:51:53,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:51:53,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2021-11-21 00:51:53,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626336940] [2021-11-21 00:51:53,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:51:53,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:51:53,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:51:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=155, Unknown=22, NotChecked=84, Total=306 [2021-11-21 00:51:53,211 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:52:59,774 WARN L227 SmtUtils]: Spent 49.90s on a formula simplification. DAG size of input: 43 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:53:01,791 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse35 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse36 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse35) 256))) (let ((.cse24 (+ 256 |c_ULTIMATE.start_main1_~y~0#1|)) (.cse37 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse35) 256)) (.cse12 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse32 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse36) 256) 0))) (.cse33 (= |c_ULTIMATE.start_main1_~y~0#1| .cse36)) (.cse34 (= .cse36 0))) (let ((.cse23 (or .cse12 .cse32 .cse33 .cse34)) (.cse11 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse37) 256) 0))) (.cse13 (= .cse37 0)) (.cse14 (= .cse37 |c_ULTIMATE.start_main1_~y~0#1|)) (.cse15 (< 127 .cse37)) (.cse16 (<= .cse37 127)) (.cse4 (<= .cse36 127)) (.cse8 (< 127 .cse36)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse37)) 256) 0))) (.cse19 (= .cse37 .cse24)) (.cse22 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse20 (= .cse24 .cse36)) (.cse21 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse36)) 256)))) (.cse26 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse25 (mod .cse35 256))) (and (or (let ((.cse1 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (and (let ((.cse0 (mod (mod .cse1 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (= .cse0 0) (< 127 .cse1) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0)))) (let ((.cse2 (mod (+ (- 256) .cse1) |c_ULTIMATE.start_main1_~y~0#1|))) (or (<= .cse1 127) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (mod (+ (* |c_ULTIMATE.start_main1_~y~0#1| 255) .cse2) 256) (- 256))) 256) 0)) (= .cse2 0))))) (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 0)) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (and (or (and (< |ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse3 (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256))) (or (and (<= .cse3 127) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) (and (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse3) (< 127 .cse3))))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main1_~x~0#1|) (<= 0 |ULTIMATE.start_main1_~x~0#1|))) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0))) (= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~y~0#1|) (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 128)) (or (let ((.cse10 (or (= .cse24 .cse25) .cse26 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse25)) 256) 0))))) (let ((.cse7 (or (and .cse10 .cse23) .cse22)) (.cse6 (or (and .cse10 (or .cse12 .cse20 .cse21)) .cse22))) (and (or (let ((.cse5 (or .cse9 (and .cse10 (or .cse11 .cse12 .cse13 .cse14))))) (and (or .cse4 (and .cse5 .cse6)) (or (and .cse5 .cse7) .cse8))) .cse15) (or .cse16 (let ((.cse17 (or .cse9 (and .cse10 (or .cse12 .cse18 .cse19))))) (and (or (and .cse17 .cse7) .cse8) (or .cse4 (and .cse6 .cse17)))))))) (<= .cse25 127)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (< 127 .cse25) (let ((.cse29 (or .cse26 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse25) 256) 0)) (= |c_ULTIMATE.start_main1_~y~0#1| .cse25) (= 0 .cse25))) (.cse30 (= .cse35 0))) (let ((.cse27 (or .cse22 (and .cse29 (or .cse12 .cse20 .cse21 .cse30))))) (and (or (let ((.cse28 (or .cse9 (and .cse29 (or .cse11 .cse12 .cse13 .cse14 .cse30))))) (and (or .cse4 (and .cse27 .cse28)) (or (and (or (and .cse29 .cse23) .cse22) .cse28) .cse8))) .cse15) (or .cse16 (let ((.cse31 (or .cse9 (and (or .cse12 .cse18 .cse19 .cse30) .cse29)))) (and (or .cse4 (and .cse31 .cse27)) (or (and (or .cse22 (and (or .cse12 .cse32 .cse33 .cse34 .cse30) .cse29)) .cse31) .cse8))))))))))))) is different from false [2021-11-21 00:53:04,976 WARN L838 $PredicateComparison]: unable to prove that (and (or (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (= |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_main1_~y~0#1|) (< (+ |c_ULTIMATE.start_gcd_test_~b#1| 128) 0) (< 127 |c_ULTIMATE.start_gcd_test_~b#1|)) (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (and (or (and (< |ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse0 (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256))) (or (and (< 127 .cse0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod (+ (- 256) .cse0) |c_ULTIMATE.start_gcd_test_~a#1|) 256))) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256))))) (and (<= 0 |ULTIMATE.start_main1_~x~0#1|) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)))) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0))) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|)) is different from false [2021-11-21 00:53:07,660 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (or (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (< |ULTIMATE.start_main1_~x~0#1| 0) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)))) is different from false [2021-11-21 00:53:09,669 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_main1_~x~0#1| Int)) (let ((.cse0 (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (< |ULTIMATE.start_main1_~x~0#1| 0) (not (= .cse0 0)) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |ULTIMATE.start_main1_~y~0#1|) 0)))) (not (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0))) is different from false [2021-11-21 00:53:11,671 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_main1_~x~0#1| Int)) (let ((.cse0 (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (< |ULTIMATE.start_main1_~x~0#1| 0) (not (= .cse0 0)) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |ULTIMATE.start_main1_~y~0#1|) 0)))) (not (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0))) is different from true [2021-11-21 00:53:13,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-21 00:53:13,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:13,926 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-21 00:53:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:53:13,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:53:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:13,927 INFO L225 Difference]: With dead ends: 29 [2021-11-21 00:53:13,927 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 00:53:13,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 219.5s TimeCoverageRelationStatistics Valid=57, Invalid=179, Unknown=32, NotChecked=238, Total=506 [2021-11-21 00:53:13,929 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:13,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 170 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 1 Unknown, 59 Unchecked, 3.2s Time] [2021-11-21 00:53:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 00:53:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-21 00:53:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:53:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-21 00:53:13,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2021-11-21 00:53:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:13,937 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-21 00:53:13,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:53:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-21 00:53:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:53:13,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:13,939 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:13,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 00:53:14,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:53:14,146 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:53:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1814613500, now seen corresponding path program 3 times [2021-11-21 00:53:14,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:14,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744582186] [2021-11-21 00:53:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:14,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:14,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:53:14,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623695353] [2021-11-21 00:53:14,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:53:14,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:53:14,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:53:14,165 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:53:14,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e3601-a1ab-402b-b4b0-bab40e4084fd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:53:23,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:53:23,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:53:23,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-21 00:53:23,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:54:48,082 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256)) (< |ULTIMATE.start_main1_~x~0#1| 0) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)))) is different from false [2021-11-21 00:57:05,656 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|ULTIMATE.start_main1_~x~0#1| Int)) (let ((.cse1 (mod (mod (mod (* |ULTIMATE.start_main1_~x~0#1| 255) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse1) 256))) (and (< |ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (not (= .cse1 0)) (not (= .cse0 0)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse1 .cse0) 256)) (= (mod |ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0))))) (<= |c_ULTIMATE.start_main1_~y~0#1| 127)) is different from false