./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur --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 605f47223f627b5d6ab9bc7372537ce49861197321d9038cf5b3c12fa8fcd03f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:31:37,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:31:37,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:31:37,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:31:37,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:31:37,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:31:37,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:31:37,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:31:37,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:31:37,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:31:37,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:31:37,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:31:37,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:31:37,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:31:37,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:31:37,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:31:37,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:31:37,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:31:37,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:31:37,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:31:37,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:31:37,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:31:37,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:31:37,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:31:37,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:31:37,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:31:37,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:31:37,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:31:37,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:31:37,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:31:37,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:31:37,902 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:31:37,903 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:31:37,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:31:37,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:31:37,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:31:37,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:31:37,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:31:37,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:31:37,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:31:37,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:31:37,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:31:37,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:31:37,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:31:37,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:31:37,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:31:37,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:31:37,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:31:37,969 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:31:37,969 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:31:37,970 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:31:37,970 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:31:37,971 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:31:37,971 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:31:37,972 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:31:37,972 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:31:37,972 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:31:37,973 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:31:37,973 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:31:37,973 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:31:37,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:31:37,974 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:31:37,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:31:37,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:31:37,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:31:37,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:31:37,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:31:37,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:31:37,976 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:31:37,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:31:37,976 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:31:37,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:31:37,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:31:37,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:31:37,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:31:37,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:31:37,978 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:31:37,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:31:37,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:31:37,979 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:31:37,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:31:37,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:31:37,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:31:37,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 605f47223f627b5d6ab9bc7372537ce49861197321d9038cf5b3c12fa8fcd03f [2022-11-26 00:31:38,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:31:38,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:31:38,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:31:38,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:31:38,333 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:31:38,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/gcd_1+newton_3_4.i [2022-11-26 00:31:41,878 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:31:42,121 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:31:42,122 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/sv-benchmarks/c/combinations/gcd_1+newton_3_4.i [2022-11-26 00:31:42,128 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/data/fbd99b60f/209543a242e94746935f4112c07fae66/FLAGc49827b2f [2022-11-26 00:31:42,141 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/data/fbd99b60f/209543a242e94746935f4112c07fae66 [2022-11-26 00:31:42,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:31:42,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:31:42,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:31:42,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:31:42,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:31:42,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@512de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42, skipping insertion in model container [2022-11-26 00:31:42,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:31:42,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:31:42,362 WARN L237 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_ea80f9ee-62e1-4eed-86b1-6fc24c232189/sv-benchmarks/c/combinations/gcd_1+newton_3_4.i[1226,1239] [2022-11-26 00:31:42,392 WARN L237 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_ea80f9ee-62e1-4eed-86b1-6fc24c232189/sv-benchmarks/c/combinations/gcd_1+newton_3_4.i[2828,2841] [2022-11-26 00:31:42,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:31:42,407 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:31:42,424 WARN L237 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_ea80f9ee-62e1-4eed-86b1-6fc24c232189/sv-benchmarks/c/combinations/gcd_1+newton_3_4.i[1226,1239] [2022-11-26 00:31:42,436 WARN L237 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_ea80f9ee-62e1-4eed-86b1-6fc24c232189/sv-benchmarks/c/combinations/gcd_1+newton_3_4.i[2828,2841] [2022-11-26 00:31:42,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:31:42,455 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:31:42,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42 WrapperNode [2022-11-26 00:31:42,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:31:42,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:31:42,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:31:42,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:31:42,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,512 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 90 [2022-11-26 00:31:42,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:31:42,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:31:42,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:31:42,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:31:42,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,565 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:31:42,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:31:42,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:31:42,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:31:42,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (1/1) ... [2022-11-26 00:31:42,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:31:42,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:42,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:31:42,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:31:42,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:31:42,678 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-26 00:31:42,678 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-26 00:31:42,679 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-26 00:31:42,679 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-26 00:31:42,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:31:42,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:31:42,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:31:42,758 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:31:42,761 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:31:43,059 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:31:43,187 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:31:43,187 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:31:43,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:31:43 BoogieIcfgContainer [2022-11-26 00:31:43,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:31:43,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:31:43,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:31:43,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:31:43,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:31:42" (1/3) ... [2022-11-26 00:31:43,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409448b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:31:43, skipping insertion in model container [2022-11-26 00:31:43,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:31:42" (2/3) ... [2022-11-26 00:31:43,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409448b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:31:43, skipping insertion in model container [2022-11-26 00:31:43,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:31:43" (3/3) ... [2022-11-26 00:31:43,207 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_4.i [2022-11-26 00:31:43,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:31:43,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-26 00:31:43,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:31:43,307 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@f356e0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:31:43,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-26 00:31:43,311 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) [2022-11-26 00:31:43,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:31:43,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:43,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:31:43,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:43,329 INFO L85 PathProgramCache]: Analyzing trace with hash -391407110, now seen corresponding path program 1 times [2022-11-26 00:31:43,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:43,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827130361] [2022-11-26 00:31:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:43,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:43,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:31:43,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545241138] [2022-11-26 00:31:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:43,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:43,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:43,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:43,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:31:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:31:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:43,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:31:43,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:43,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827130361] [2022-11-26 00:31:43,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:31:43,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545241138] [2022-11-26 00:31:43,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545241138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:31:43,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:31:43,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:31:43,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664995943] [2022-11-26 00:31:43,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:31:43,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:31:43,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:43,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:31:43,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:31:43,869 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) [2022-11-26 00:31:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:43,918 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-11-26 00:31:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:31:43,926 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 [2022-11-26 00:31:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:43,935 INFO L225 Difference]: With dead ends: 37 [2022-11-26 00:31:43,935 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:31:43,938 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:31:43,942 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 24 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 [2022-11-26 00:31:43,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:31:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:31:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-26 00:31:43,983 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) [2022-11-26 00:31:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-26 00:31:43,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2022-11-26 00:31:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:43,986 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-26 00:31:43,987 INFO L496 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) [2022-11-26 00:31:43,987 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-26 00:31:43,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:31:43,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:44,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:44,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:31:44,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:31:44,202 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:44,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash 749024068, now seen corresponding path program 1 times [2022-11-26 00:31:44,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:44,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122073192] [2022-11-26 00:31:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:44,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:44,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:31:44,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425112536] [2022-11-26 00:31:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:44,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:44,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:44,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:44,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:31:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:44,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:31:44,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:44,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:44,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:31:44,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122073192] [2022-11-26 00:31:44,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:31:44,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425112536] [2022-11-26 00:31:44,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425112536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92105786] [2022-11-26 00:31:44,552 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:31:44,552 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:31:44,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:31:44,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:31:44,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:31:44,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:31:45,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|) 1 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main1_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:31:45,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:31:45,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:31:45,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-26 00:31:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453217487] [2022-11-26 00:31:45,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:45,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:31:45,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:31:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:31:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:31:45,518 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2022-11-26 00:31:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:45,635 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-26 00:31:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:31:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 [2022-11-26 00:31:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:45,638 INFO L225 Difference]: With dead ends: 28 [2022-11-26 00:31:45,638 INFO L226 Difference]: Without dead ends: 25 [2022-11-26 00:31:45,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:31:45,642 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 76 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 [2022-11-26 00:31:45,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:31:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-26 00:31:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-26 00:31:45,661 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) [2022-11-26 00:31:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-26 00:31:45,662 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2022-11-26 00:31:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:45,662 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-26 00:31:45,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2022-11-26 00:31:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-26 00:31:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:31:45,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:45,663 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:45,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:45,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:45,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:31:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:45,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1742652218, now seen corresponding path program 2 times [2022-11-26 00:31:45,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:31:45,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459086042] [2022-11-26 00:31:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:45,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:31:45,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:31:45,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550049468] [2022-11-26 00:31:45,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:31:45,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:45,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:45,884 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:45,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:31:59,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:31:59,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:31:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:31:59,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:19,237 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:32:37,863 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 47 DAG size of output: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:33:01,055 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= 0 .cse0)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0))))) is different from false [2022-11-26 00:33:31,814 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |ULTIMATE.start_main1_~y~0#1|) 0) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (not (= .cse0 0))))) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) is different from false [2022-11-26 00:33:51,824 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |ULTIMATE.start_main1_~y~0#1|) 0) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (not (= .cse0 0))))) is different from false [2022-11-26 00:33:53,827 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |ULTIMATE.start_main1_~y~0#1|) 0) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (not (= .cse0 0))))) is different from true [2022-11-26 00:33:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 00:33:53,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:35:00,184 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse19 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse33 (mod (+ .cse32 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse34 (mod (+ .cse32 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse18 (mod .cse32 256)) (.cse5 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (<= .cse34 127)) (.cse0 (<= .cse33 127)) (.cse25 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse33) 256) 0))) (.cse27 (= .cse33 0)) (.cse28 (= |c_ULTIMATE.start_main1_~y~0#1| .cse33)) (.cse29 (= .cse34 0)) (.cse30 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse34) 256) 0))) (.cse13 (not .cse19)) (.cse31 (= |c_ULTIMATE.start_main1_~y~0#1| .cse34)) (.cse20 (+ |c_ULTIMATE.start_main1_~y~0#1| 256))) (let ((.cse11 (= .cse34 .cse20)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse34)) 256) 0))) (.cse6 (or .cse29 .cse30 .cse13 .cse31)) (.cse17 (or .cse25 .cse13 .cse27 .cse28)) (.cse3 (not .cse0)) (.cse8 (not .cse9)) (.cse14 (not .cse5)) (.cse15 (= .cse33 .cse20)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse33)) 256) 0))) (.cse21 (<= .cse18 127))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse18)) 256) 0)) .cse19 (= .cse18 .cse20)))) (let ((.cse4 (or .cse14 (and .cse17 .cse7))) (.cse1 (or .cse14 (and .cse7 (or .cse15 .cse16 .cse13))))) (and (or (let ((.cse2 (or .cse5 (and .cse6 .cse7)))) (and (or .cse0 (and .cse1 .cse2)) (or .cse3 (and .cse4 .cse2)))) .cse8) (or .cse9 (let ((.cse10 (or (and .cse7 (or .cse11 .cse12 .cse13)) .cse5))) (and (or .cse3 (and .cse10 .cse4)) (or .cse0 (and .cse10 .cse1)))))))) .cse21) (or (let ((.cse24 (or .cse19 (= |c_ULTIMATE.start_main1_~y~0#1| .cse18) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256) 0)) (= .cse18 0))) (.cse26 (= .cse32 0))) (let ((.cse22 (or .cse14 (and .cse24 (or .cse26 .cse15 .cse16 .cse13))))) (and (or .cse9 (let ((.cse23 (or (and .cse24 (or .cse26 .cse11 .cse12 .cse13)) .cse5))) (and (or (and .cse22 .cse23) .cse0) (or (and (or .cse14 (and .cse24 (or .cse25 .cse26 .cse13 .cse27 .cse28))) .cse23) .cse3)))) (or (and (or (and (or (and .cse6 .cse24) .cse5) (or .cse14 (and .cse24 .cse17))) .cse3) (or .cse0 (and (or (and .cse24 (or .cse26 .cse29 .cse30 .cse13 .cse31)) .cse5) .cse22))) .cse8)))) (not .cse21))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from false [2022-11-26 00:35:02,191 WARN L859 $PredicateComparison]: unable to prove that (or (let ((.cse32 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse19 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse33 (mod (+ .cse32 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse34 (mod (+ .cse32 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse18 (mod .cse32 256)) (.cse5 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (<= .cse34 127)) (.cse0 (<= .cse33 127)) (.cse25 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse33) 256) 0))) (.cse27 (= .cse33 0)) (.cse28 (= |c_ULTIMATE.start_main1_~y~0#1| .cse33)) (.cse29 (= .cse34 0)) (.cse30 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse34) 256) 0))) (.cse13 (not .cse19)) (.cse31 (= |c_ULTIMATE.start_main1_~y~0#1| .cse34)) (.cse20 (+ |c_ULTIMATE.start_main1_~y~0#1| 256))) (let ((.cse11 (= .cse34 .cse20)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse34)) 256) 0))) (.cse6 (or .cse29 .cse30 .cse13 .cse31)) (.cse17 (or .cse25 .cse13 .cse27 .cse28)) (.cse3 (not .cse0)) (.cse8 (not .cse9)) (.cse14 (not .cse5)) (.cse15 (= .cse33 .cse20)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse33)) 256) 0))) (.cse21 (<= .cse18 127))) (and (or (let ((.cse7 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse18)) 256) 0)) .cse19 (= .cse18 .cse20)))) (let ((.cse4 (or .cse14 (and .cse17 .cse7))) (.cse1 (or .cse14 (and .cse7 (or .cse15 .cse16 .cse13))))) (and (or (let ((.cse2 (or .cse5 (and .cse6 .cse7)))) (and (or .cse0 (and .cse1 .cse2)) (or .cse3 (and .cse4 .cse2)))) .cse8) (or .cse9 (let ((.cse10 (or (and .cse7 (or .cse11 .cse12 .cse13)) .cse5))) (and (or .cse3 (and .cse10 .cse4)) (or .cse0 (and .cse10 .cse1)))))))) .cse21) (or (let ((.cse24 (or .cse19 (= |c_ULTIMATE.start_main1_~y~0#1| .cse18) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256) 0)) (= .cse18 0))) (.cse26 (= .cse32 0))) (let ((.cse22 (or .cse14 (and .cse24 (or .cse26 .cse15 .cse16 .cse13))))) (and (or .cse9 (let ((.cse23 (or (and .cse24 (or .cse26 .cse11 .cse12 .cse13)) .cse5))) (and (or (and .cse22 .cse23) .cse0) (or (and (or .cse14 (and .cse24 (or .cse25 .cse26 .cse13 .cse27 .cse28))) .cse23) .cse3)))) (or (and (or (and (or (and .cse6 .cse24) .cse5) (or .cse14 (and .cse24 .cse17))) .cse3) (or .cse0 (and (or (and .cse24 (or .cse26 .cse29 .cse30 .cse13 .cse31)) .cse5) .cse22))) .cse8)))) (not .cse21))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true [2022-11-26 00:35:30,780 WARN L859 $PredicateComparison]: unable to prove that (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse2 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse3 (<= .cse2 127))) (and (or (let ((.cse1 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (let ((.cse0 (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse1 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)))) (and (or .cse0 (= .cse1 0)) (or .cse0 (<= (mod .cse1 256) 127))))) .cse3) (let ((.cse4 (mod (mod .cse2 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse3) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse4) 256) 0)) (= .cse4 0)))))) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0))) is different from true [2022-11-26 00:36:20,795 WARN L837 $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 (* 255 |v_ULTIMATE.start_main1_~x~0#1_7|) 256) |v_ULTIMATE.start_main1_~y~0#1_12|) 256))) (or (not (= 0 (mod (mod |v_ULTIMATE.start_main1_~y~0#1_12| .cse0) 256))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_7|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_7|) 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)) (= .cse0 0)))) is different from false [2022-11-26 00:36:22,798 WARN L859 $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 (* 255 |v_ULTIMATE.start_main1_~x~0#1_7|) 256) |v_ULTIMATE.start_main1_~y~0#1_12|) 256))) (or (not (= 0 (mod (mod |v_ULTIMATE.start_main1_~y~0#1_12| .cse0) 256))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_7|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_7|) 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)) (= .cse0 0)))) is different from true [2022-11-26 00:36:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 00:36:22,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:36:22,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459086042] [2022-11-26 00:36:22,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:36:22,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550049468] [2022-11-26 00:36:22,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550049468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:36:22,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469505346] [2022-11-26 00:36:22,802 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:36:22,802 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:36:22,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:36:22,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:36:22,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:36:22,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:36:27,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '318#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|) 1 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main1_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:36:27,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:36:27,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:36:27,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-26 00:36:27,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497762765] [2022-11-26 00:36:27,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:36:27,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:36:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:36:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:36:27,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=121, Unknown=12, NotChecked=162, Total=342 [2022-11-26 00:36:27,882 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2022-11-26 00:37:26,672 WARN L233 SmtUtils]: Spent 44.90s on a formula simplification. DAG size of input: 51 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:37:28,756 WARN L837 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) (or (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (<= .cse0 127)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse0)))) (and (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse1 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse1 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1))))) (or (let ((.cse34 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse35 (mod (+ .cse34 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse36 (mod (+ .cse34 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse20 (mod .cse34 256)) (.cse7 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse11 (<= .cse36 127)) (.cse2 (<= .cse35 127)) (.cse27 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse35) 256) 0))) (.cse29 (= .cse35 0)) (.cse30 (= |c_ULTIMATE.start_main1_~y~0#1| .cse35)) (.cse31 (= .cse36 0)) (.cse32 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse36) 256) 0))) (.cse15 (not .cse21)) (.cse33 (= |c_ULTIMATE.start_main1_~y~0#1| .cse36)) (.cse22 (+ |c_ULTIMATE.start_main1_~y~0#1| 256))) (let ((.cse13 (= .cse36 .cse22)) (.cse14 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse36)) 256) 0))) (.cse8 (or .cse31 .cse32 .cse15 .cse33)) (.cse19 (or .cse27 .cse15 .cse29 .cse30)) (.cse5 (not .cse2)) (.cse10 (not .cse11)) (.cse16 (not .cse7)) (.cse17 (= .cse35 .cse22)) (.cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse35)) 256) 0))) (.cse23 (<= .cse20 127))) (and (or (let ((.cse9 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse20)) 256) 0)) .cse21 (= .cse20 .cse22)))) (let ((.cse6 (or .cse16 (and .cse19 .cse9))) (.cse3 (or .cse16 (and .cse9 (or .cse17 .cse18 .cse15))))) (and (or (let ((.cse4 (or .cse7 (and .cse8 .cse9)))) (and (or .cse2 (and .cse3 .cse4)) (or .cse5 (and .cse6 .cse4)))) .cse10) (or .cse11 (let ((.cse12 (or (and .cse9 (or .cse13 .cse14 .cse15)) .cse7))) (and (or .cse5 (and .cse12 .cse6)) (or .cse2 (and .cse12 .cse3)))))))) .cse23) (or (let ((.cse26 (or .cse21 (= |c_ULTIMATE.start_main1_~y~0#1| .cse20) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse20) 256) 0)) (= .cse20 0))) (.cse28 (= .cse34 0))) (let ((.cse24 (or .cse16 (and .cse26 (or .cse28 .cse17 .cse18 .cse15))))) (and (or .cse11 (let ((.cse25 (or (and .cse26 (or .cse28 .cse13 .cse14 .cse15)) .cse7))) (and (or (and .cse24 .cse25) .cse2) (or (and (or .cse16 (and .cse26 (or .cse27 .cse28 .cse15 .cse29 .cse30))) .cse25) .cse5)))) (or (and (or (and (or (and .cse8 .cse26) .cse7) (or .cse16 (and .cse26 .cse19))) .cse5) (or .cse2 (and (or (and .cse26 (or .cse28 .cse31 .cse32 .cse15 .cse33)) .cse7) .cse24))) .cse10)))) (not .cse23))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0))) is different from false [2022-11-26 00:37:31,860 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse0 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse0 |c_ULTIMATE.start_main1_~y~0#1|) 256))))) (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (or (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 128))) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 256) 0)) (not (<= |c_ULTIMATE.start_gcd_test_~b#1| 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|))) is different from false [2022-11-26 00:37:33,882 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= 0 .cse0)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0)))) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128))))) is different from false [2022-11-26 00:37:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:37:33,901 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-26 00:37:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:37:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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 [2022-11-26 00:37:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:37:33,903 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:37:33,903 INFO L226 Difference]: Without dead ends: 26 [2022-11-26 00:37:33,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 106.2s TimeCoverageRelationStatistics Valid=56, Invalid=141, Unknown=21, NotChecked=288, Total=506 [2022-11-26 00:37:33,905 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:37:33,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 150 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 114 Unchecked, 0.1s Time] [2022-11-26 00:37:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-26 00:37:33,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-26 00:37:33,925 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) [2022-11-26 00:37:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-26 00:37:33,926 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2022-11-26 00:37:33,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:37:33,927 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-26 00:37:33,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 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) [2022-11-26 00:37:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-26 00:37:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:37:33,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:37:33,928 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-26 00:37:33,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 00:37:34,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:34,135 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:37:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:37:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1814613500, now seen corresponding path program 3 times [2022-11-26 00:37:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:37:34,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722249849] [2022-11-26 00:37:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:37:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:37:34,148 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:37:34,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677681495] [2022-11-26 00:37:34,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:37:34,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:34,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:34,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:34,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea80f9ee-62e1-4eed-86b1-6fc24c232189/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:37:43,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:37:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:37:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:37:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:38:05,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:45:05,485 WARN L233 SmtUtils]: Spent 6.07m on a formula simplification. DAG size of input: 119 DAG size of output: 117 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)