./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_2_7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_2_7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS --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 184de52a0dff4eb1d8c7e38c30c44a1d55b19bad29c4bb3af8f1421516bacfd9 --- 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-8393723 [2022-11-19 08:13:40,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:13:40,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:13:40,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:13:40,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:13:40,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:13:40,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:13:40,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:13:40,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:13:40,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:13:40,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:13:40,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:13:40,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:13:40,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:13:40,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:13:40,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:13:40,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:13:40,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:13:40,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:13:40,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:13:40,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:13:40,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:13:40,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:13:40,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:13:40,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:13:40,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:13:40,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:13:40,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:13:40,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:13:40,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:13:40,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:13:40,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:13:40,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:13:40,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:13:40,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:13:40,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:13:40,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:13:40,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:13:40,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:13:40,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:13:40,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:13:40,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:13:40,998 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:13:40,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:13:40,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:13:40,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:13:41,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:13:41,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:13:41,001 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:13:41,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:13:41,002 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:13:41,002 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:13:41,003 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:13:41,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:13:41,004 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:13:41,004 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:13:41,004 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:13:41,005 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:13:41,005 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:13:41,005 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:13:41,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:13:41,006 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:13:41,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:13:41,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:13:41,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:13:41,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:13:41,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:13:41,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:13:41,008 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:13:41,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:13:41,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:13:41,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:13:41,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:13:41,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:13:41,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:13:41,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:13:41,010 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:13:41,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:13:41,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:13:41,011 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:13:41,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:13:41,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:13:41,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:13:41,012 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_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 184de52a0dff4eb1d8c7e38c30c44a1d55b19bad29c4bb3af8f1421516bacfd9 [2022-11-19 08:13:41,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:13:41,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:13:41,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:13:41,347 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:13:41,348 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:13:41,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_1+newton_2_7.i [2022-11-19 08:13:41,426 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/data/047be0495/b974c83cbb13407abe4ce19ed9319669/FLAGf3921ce81 [2022-11-19 08:13:41,880 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:13:41,880 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/sv-benchmarks/c/combinations/gcd_1+newton_2_7.i [2022-11-19 08:13:41,893 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/data/047be0495/b974c83cbb13407abe4ce19ed9319669/FLAGf3921ce81 [2022-11-19 08:13:42,285 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/data/047be0495/b974c83cbb13407abe4ce19ed9319669 [2022-11-19 08:13:42,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:13:42,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:13:42,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:13:42,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:13:42,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:13:42,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b73c329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42, skipping insertion in model container [2022-11-19 08:13:42,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:13:42,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:13:42,527 WARN L234 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_1ba21e99-2d57-4514-9831-5d35f217891c/sv-benchmarks/c/combinations/gcd_1+newton_2_7.i[1226,1239] [2022-11-19 08:13:42,552 WARN L234 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_1ba21e99-2d57-4514-9831-5d35f217891c/sv-benchmarks/c/combinations/gcd_1+newton_2_7.i[2807,2820] [2022-11-19 08:13:42,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:13:42,562 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:13:42,574 WARN L234 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_1ba21e99-2d57-4514-9831-5d35f217891c/sv-benchmarks/c/combinations/gcd_1+newton_2_7.i[1226,1239] [2022-11-19 08:13:42,585 WARN L234 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_1ba21e99-2d57-4514-9831-5d35f217891c/sv-benchmarks/c/combinations/gcd_1+newton_2_7.i[2807,2820] [2022-11-19 08:13:42,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:13:42,600 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:13:42,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42 WrapperNode [2022-11-19 08:13:42,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:13:42,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:13:42,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:13:42,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:13:42,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,641 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2022-11-19 08:13:42,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:13:42,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:13:42,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:13:42,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:13:42,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:13:42,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:13:42,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:13:42,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:13:42,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (1/1) ... [2022-11-19 08:13:42,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:13:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:42,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:13:42,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:13:42,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:13:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 08:13:42,771 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 08:13:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 08:13:42,771 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 08:13:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:13:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:13:42,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:13:42,844 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:13:42,846 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:13:43,033 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:13:43,121 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:13:43,126 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:13:43,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:13:43 BoogieIcfgContainer [2022-11-19 08:13:43,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:13:43,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:13:43,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:13:43,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:13:43,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:13:42" (1/3) ... [2022-11-19 08:13:43,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37815665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:13:43, skipping insertion in model container [2022-11-19 08:13:43,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:13:42" (2/3) ... [2022-11-19 08:13:43,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37815665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:13:43, skipping insertion in model container [2022-11-19 08:13:43,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:13:43" (3/3) ... [2022-11-19 08:13:43,137 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_7.i [2022-11-19 08:13:43,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:13:43,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:13:43,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:13:43,215 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;@7a3923fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:13:43,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:13:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:13:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:13:43,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:43,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:13:43,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash -592026431, now seen corresponding path program 1 times [2022-11-19 08:13:43,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:43,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754089217] [2022-11-19 08:13:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:43,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:43,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:13:43,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517758889] [2022-11-19 08:13:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:43,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:43,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:43,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:43,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:13:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:43,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:13:43,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:43,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:13:43,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:43,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754089217] [2022-11-19 08:13:43,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:13:43,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517758889] [2022-11-19 08:13:43,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517758889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:13:43,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:13:43,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:13:43,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554113599] [2022-11-19 08:13:43,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:13:43,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:13:43,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:13:43,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:13:43,660 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2022-11-19 08:13:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:43,709 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2022-11-19 08:13:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:13:43,712 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 [2022-11-19 08:13:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:43,731 INFO L225 Difference]: With dead ends: 34 [2022-11-19 08:13:43,731 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 08:13:43,734 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 [2022-11-19 08:13:43,737 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 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 [2022-11-19 08:13:43,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:13:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 08:13:43,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-19 08:13:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:13:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-19 08:13:43,806 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2022-11-19 08:13:43,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:43,807 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-19 08:13:43,807 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) [2022-11-19 08:13:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-19 08:13:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:13:43,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:43,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:43,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:13:44,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:44,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:44,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1175005777, now seen corresponding path program 1 times [2022-11-19 08:13:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:44,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616511606] [2022-11-19 08:13:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:44,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:44,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:13:44,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392015641] [2022-11-19 08:13:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:44,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:44,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:44,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:13:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:13:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:44,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:44,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:44,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616511606] [2022-11-19 08:13:44,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:13:44,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392015641] [2022-11-19 08:13:44,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392015641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:44,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859434450] [2022-11-19 08:13:44,369 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:13:44,369 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:44,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:44,381 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:44,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:44,737 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:45,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '167#(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 [2022-11-19 08:13:45,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:45,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:13:45,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-19 08:13:45,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989774642] [2022-11-19 08:13:45,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:45,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:13:45,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:45,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:13:45,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:13:45,147 INFO L87 Difference]: Start difference. First operand 21 states and 23 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) [2022-11-19 08:13:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:45,226 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-11-19 08:13:45,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:13:45,227 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 [2022-11-19 08:13:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:45,227 INFO L225 Difference]: With dead ends: 25 [2022-11-19 08:13:45,228 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 08:13:45,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:13:45,235 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:45,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:13:45,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 08:13:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-19 08:13:45,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:13:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-19 08:13:45,252 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2022-11-19 08:13:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:45,254 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-19 08:13:45,254 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) [2022-11-19 08:13:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-19 08:13:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:13:45,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:45,256 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:45,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 08:13:45,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:45,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:45,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:45,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2067496319, now seen corresponding path program 2 times [2022-11-19 08:13:45,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:45,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956352160] [2022-11-19 08:13:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:45,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:45,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:13:45,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006065384] [2022-11-19 08:13:45,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:13:45,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:45,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:45,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:45,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:13:58,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:13:58,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:58,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 08:13:58,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:19,163 WARN L233 SmtUtils]: Spent 6.22s 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) [2022-11-19 08:14:33,769 WARN L233 SmtUtils]: Spent 6.67s 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) [2022-11-19 08:14:56,303 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 [2022-11-19 08:15:28,896 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 [2022-11-19 08:15:47,533 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 [2022-11-19 08:15:49,536 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 [2022-11-19 08:15:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-19 08:15:49,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:09,139 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 [2022-11-19 08:18:51,154 WARN L233 SmtUtils]: Spent 56.94s on a formula simplification. DAG size of input: 45 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:19:37,192 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 [2022-11-19 08:19:39,196 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 [2022-11-19 08:19:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-19 08:19:39,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:19:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956352160] [2022-11-19 08:19:39,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:19:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006065384] [2022-11-19 08:19:39,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006065384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [530236748] [2022-11-19 08:19:39,199 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:19:39,199 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:19:39,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:19:39,200 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:19:39,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:19:39,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:19:57,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '295#(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 [2022-11-19 08:19:57,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:19:57,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:19:57,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-19 08:19:57,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247488104] [2022-11-19 08:19:57,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:19:57,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:19:57,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:19:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=20, NotChecked=140, Total=342 [2022-11-19 08:19:57,032 INFO L87 Difference]: Start difference. First operand 22 states and 24 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) [2022-11-19 08:19:59,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:20:52,409 WARN L233 SmtUtils]: Spent 42.98s on a formula simplification. DAG size of input: 46 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:20:55,145 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (< 0 |c_ULTIMATE.start_main1_~y~0#1|))) (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) .cse0 (<= 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 (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse3 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse2 (<= .cse3 127))) (and (let ((.cse1 (mod (+ .cse3 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse1 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) .cse2 (= .cse1 0))) (let ((.cse4 (mod (mod .cse3 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse2) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse4) 256) 0)) (= .cse4 0)))))) (not .cse0) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0))) (or (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse5 (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 (<= .cse5 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) .cse5)))) (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 ((.cse6 (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)) (<= .cse6 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse6))))) (or (let ((.cse39 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse40 (mod (+ .cse39 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse41 (mod (+ .cse39 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse25 (mod .cse39 256)) (.cse12 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse16 (<= .cse41 127)) (.cse7 (<= .cse40 127)) (.cse32 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse40) 256) 0))) (.cse34 (= .cse40 0)) (.cse35 (= |c_ULTIMATE.start_main1_~y~0#1| .cse40)) (.cse36 (= .cse41 0)) (.cse37 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse41) 256) 0))) (.cse20 (not .cse26)) (.cse38 (= |c_ULTIMATE.start_main1_~y~0#1| .cse41)) (.cse27 (+ |c_ULTIMATE.start_main1_~y~0#1| 256))) (let ((.cse18 (= .cse41 .cse27)) (.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse41)) 256) 0))) (.cse13 (or .cse36 .cse37 .cse20 .cse38)) (.cse24 (or .cse32 .cse20 .cse34 .cse35)) (.cse10 (not .cse7)) (.cse15 (not .cse16)) (.cse21 (not .cse12)) (.cse22 (= .cse40 .cse27)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse40)) 256) 0))) (.cse28 (<= .cse25 127))) (and (or (let ((.cse14 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse25)) 256) 0)) .cse26 (= .cse25 .cse27)))) (let ((.cse11 (or .cse21 (and .cse24 .cse14))) (.cse8 (or .cse21 (and .cse14 (or .cse22 .cse23 .cse20))))) (and (or (let ((.cse9 (or .cse12 (and .cse13 .cse14)))) (and (or .cse7 (and .cse8 .cse9)) (or .cse10 (and .cse11 .cse9)))) .cse15) (or .cse16 (let ((.cse17 (or (and .cse14 (or .cse18 .cse19 .cse20)) .cse12))) (and (or .cse10 (and .cse17 .cse11)) (or .cse7 (and .cse17 .cse8)))))))) .cse28) (or (let ((.cse31 (or .cse26 (= |c_ULTIMATE.start_main1_~y~0#1| .cse25) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse25) 256) 0)) (= .cse25 0))) (.cse33 (= .cse39 0))) (let ((.cse29 (or .cse21 (and .cse31 (or .cse33 .cse22 .cse23 .cse20))))) (and (or .cse16 (let ((.cse30 (or (and .cse31 (or .cse33 .cse18 .cse19 .cse20)) .cse12))) (and (or (and .cse29 .cse30) .cse7) (or (and (or .cse21 (and .cse31 (or .cse32 .cse33 .cse20 .cse34 .cse35))) .cse30) .cse10)))) (or (and (or (and (or (and .cse13 .cse31) .cse12) (or .cse21 (and .cse31 .cse24))) .cse10) (or .cse7 (and (or (and .cse31 (or .cse33 .cse36 .cse37 .cse20 .cse38)) .cse12) .cse29))) .cse15)))) (not .cse28))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)))) is different from true [2022-11-19 08:21:30,512 WARN L233 SmtUtils]: Spent 30.65s on a formula simplification. DAG size of input: 37 DAG size of output: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:21:32,813 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 [2022-11-19 08:21:33,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:33,015 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-11-19 08:21:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:21:33,016 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 [2022-11-19 08:21:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:33,016 INFO L225 Difference]: With dead ends: 26 [2022-11-19 08:21:33,017 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 08:21:33,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 211.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=28, NotChecked=238, Total=506 [2022-11-19 08:21:33,018 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:33,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 110 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 1 Unknown, 68 Unchecked, 2.5s Time] [2022-11-19 08:21:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 08:21:33,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-19 08:21:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:21:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-11-19 08:21:33,027 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 8 [2022-11-19 08:21:33,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:33,028 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-11-19 08:21:33,028 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) [2022-11-19 08:21:33,028 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-11-19 08:21:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:21:33,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:33,029 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:33,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 08:21:33,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:33,240 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash 330067951, now seen corresponding path program 3 times [2022-11-19 08:21:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:33,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430144460] [2022-11-19 08:21:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:33,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:21:33,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2178928] [2022-11-19 08:21:33,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:21:33,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:33,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:33,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:33,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ba21e99-2d57-4514-9831-5d35f217891c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:21:42,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:21:42,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:21:42,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 08:21:42,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:18,365 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 43 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:23:12,500 WARN L837 $PredicateComparison]: unable to prove that (and (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (= (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256) |c_ULTIMATE.start_gcd_test_~a#1|)))) is different from false [2022-11-19 08:23:54,387 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (let ((.cse1 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 0) (not (= .cse0 0)) (= (mod (mod .cse0 .cse1) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= .cse1 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|))))) is different from false [2022-11-19 08:24:20,844 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (let ((.cse1 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod (mod .cse0 .cse1) 256) 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 0) (not (= .cse0 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= .cse1 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|))))) is different from false [2022-11-19 08:24:22,858 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int) (|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (let ((.cse1 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod (mod .cse0 .cse1) 256) 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 0) (not (= .cse0 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (= .cse1 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_33|))))) is different from true [2022-11-19 08:24:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-19 08:24:46,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:36,550 WARN L859 $PredicateComparison]: unable to prove that (or (let ((.cse23 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse31 (mod (+ .cse23 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse15 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse32 (mod (+ .cse23 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse24 (mod .cse23 256)) (.cse2 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse12 (<= .cse32 127)) (.cse7 (= .cse32 0)) (.cse8 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse32) 256) 0))) (.cse9 (not .cse15)) (.cse5 (<= .cse31 127))) (let ((.cse14 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse32)) 256) 0))) (.cse4 (not .cse5)) (.cse1 (or .cse7 .cse8 .cse9)) (.cse11 (not .cse12)) (.cse22 (not (= (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse31)) 0))) (.cse21 (not .cse2)) (.cse19 (= .cse31 0)) (.cse20 (not (= (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse31) 0))) (.cse25 (<= .cse24 127))) (and (or (let ((.cse16 (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24)) (.cse17 (= .cse24 0))) (let ((.cse18 (or (not (= .cse16 0)) .cse15 .cse17)) (.cse6 (= .cse23 0))) (let ((.cse10 (or .cse21 (and .cse18 (or .cse6 .cse9 .cse22)))) (.cse3 (or (and .cse18 (or .cse6 .cse9 .cse19 .cse20)) .cse21)) (.cse0 (or .cse15 (not (= (mod .cse16 256) 0)) .cse17))) (and (or (and (or (and (or (and .cse0 .cse1) .cse2) .cse3) .cse4) (or .cse5 (and (or .cse2 (and .cse0 (or .cse6 .cse7 .cse8 .cse9))) .cse10))) .cse11) (or .cse12 (let ((.cse13 (or (and (or .cse6 .cse14 .cse9) .cse0) .cse2))) (and (or (and .cse13 .cse10) .cse5) (or (and .cse13 .cse3) .cse4)))))))) (not .cse25)) (or (let ((.cse29 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse24)) 256) 0)) .cse15))) (let ((.cse26 (or .cse21 (and (or .cse9 .cse19 .cse20) .cse29))) (.cse28 (or .cse21 (and .cse29 (or .cse9 .cse22))))) (and (or (let ((.cse27 (or .cse2 (and (or .cse14 .cse9) .cse29)))) (and (or .cse4 (and .cse26 .cse27)) (or (and .cse28 .cse27) .cse5))) .cse12) (or (let ((.cse30 (or (and .cse29 .cse1) .cse2))) (and (or (and .cse26 .cse30) .cse4) (or (and .cse30 .cse28) .cse5))) .cse11)))) .cse25)))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true [2022-11-19 08:29:12,511 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse22 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse47 (mod (+ .cse22 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse49 (* |c_ULTIMATE.start_gcd_test_~b#1| 255))) (let ((.cse45 (mod (+ .cse22 .cse49) 256)) (.cse43 (+ (- 256) .cse47))) (let ((.cse44 (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse43)) (.cse14 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse41 (+ (- 256) .cse45)) (.cse46 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse45) 256)) (.cse37 (* .cse22 255)) (.cse48 (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse47))) (let ((.cse23 (mod .cse22 256)) (.cse2 (<= .cse47 127)) (.cse28 (not (= (mod (mod .cse47 (+ (mod (+ .cse37 .cse49 .cse48) 256) (- 256))) 256) 0))) (.cse29 (= .cse48 0)) (.cse30 (= .cse47 0)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse34 (= .cse46 0)) (.cse35 (= .cse45 0)) (.cse36 (not (= (mod (mod .cse45 .cse46) 256) 0))) (.cse10 (<= .cse45 127)) (.cse42 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse41) 256)) (.cse5 (not .cse14)) (.cse32 (= .cse44 0)) (.cse33 (not (= (mod .cse43 (+ (- 256) (mod (+ .cse22 .cse44 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) 0)))) (let ((.cse21 (or .cse5 .cse32 .cse33)) (.cse6 (= .cse42 0)) (.cse7 (not (= 0 (mod .cse41 .cse42)))) (.cse13 (not .cse10)) (.cse12 (or .cse34 .cse35 .cse36 .cse5)) (.cse18 (not .cse9)) (.cse20 (or .cse28 .cse29 .cse5 .cse30)) (.cse4 (not .cse2)) (.cse24 (<= .cse23 127))) (and (or (let ((.cse16 (+ (- 256) .cse23))) (let ((.cse17 (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16))) (let ((.cse19 (or .cse14 (not (= (mod .cse16 (+ (- 256) (mod (+ .cse22 .cse17) 256))) 0)) (= .cse17 0)))) (let ((.cse1 (or .cse18 (and .cse19 .cse21))) (.cse3 (or .cse18 (and .cse19 .cse20))) (.cse8 (let ((.cse15 (mod .cse17 256))) (or .cse14 (= .cse15 0) (not (= (mod .cse16 .cse15) 0)))))) (and (or (let ((.cse0 (or (and (or .cse5 .cse6 .cse7) .cse8) .cse9))) (and (or (and .cse0 .cse1) .cse2) (or (and .cse3 .cse0) .cse4))) .cse10) (or (let ((.cse11 (or (and .cse12 .cse8) .cse9))) (and (or (and .cse11 .cse1) .cse2) (or .cse4 (and .cse3 .cse11)))) .cse13)))))) .cse24) (or (let ((.cse39 (= .cse23 0)) (.cse38 (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23))) (let ((.cse27 (= .cse22 0)) (.cse31 (let ((.cse40 (mod .cse38 256))) (or (not (= (mod (mod .cse23 .cse40) 256) 0)) .cse14 (= .cse40 0) .cse39))) (.cse25 (or (not (= (mod (mod .cse23 (+ (mod (+ .cse37 .cse38) 256) (- 256))) 256) 0)) .cse14 (= .cse38 0) .cse39))) (and (or (let ((.cse26 (or (and (or .cse27 .cse5 .cse6 .cse7) .cse31) .cse9))) (and (or .cse2 (and (or .cse18 (and .cse25 .cse21)) .cse26)) (or (and .cse26 (or .cse18 (and .cse25 (or .cse27 .cse28 .cse29 .cse5 .cse30)))) .cse4))) .cse10) (or .cse13 (and (or (and (or (and (or .cse27 .cse5 .cse32 .cse33) .cse25) .cse18) (or (and .cse31 (or .cse34 .cse27 .cse35 .cse36 .cse5)) .cse9)) .cse2) (or (and (or .cse9 (and .cse31 .cse12)) (or .cse18 (and .cse25 .cse20))) .cse4)))))) (not .cse24))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from false [2022-11-19 08:29:14,517 WARN L859 $PredicateComparison]: unable to prove that (or (let ((.cse22 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse47 (mod (+ .cse22 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse49 (* |c_ULTIMATE.start_gcd_test_~b#1| 255))) (let ((.cse45 (mod (+ .cse22 .cse49) 256)) (.cse43 (+ (- 256) .cse47))) (let ((.cse44 (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse43)) (.cse14 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse41 (+ (- 256) .cse45)) (.cse46 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse45) 256)) (.cse37 (* .cse22 255)) (.cse48 (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse47))) (let ((.cse23 (mod .cse22 256)) (.cse2 (<= .cse47 127)) (.cse28 (not (= (mod (mod .cse47 (+ (mod (+ .cse37 .cse49 .cse48) 256) (- 256))) 256) 0))) (.cse29 (= .cse48 0)) (.cse30 (= .cse47 0)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse34 (= .cse46 0)) (.cse35 (= .cse45 0)) (.cse36 (not (= (mod (mod .cse45 .cse46) 256) 0))) (.cse10 (<= .cse45 127)) (.cse42 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse41) 256)) (.cse5 (not .cse14)) (.cse32 (= .cse44 0)) (.cse33 (not (= (mod .cse43 (+ (- 256) (mod (+ .cse22 .cse44 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) 0)))) (let ((.cse21 (or .cse5 .cse32 .cse33)) (.cse6 (= .cse42 0)) (.cse7 (not (= 0 (mod .cse41 .cse42)))) (.cse13 (not .cse10)) (.cse12 (or .cse34 .cse35 .cse36 .cse5)) (.cse18 (not .cse9)) (.cse20 (or .cse28 .cse29 .cse5 .cse30)) (.cse4 (not .cse2)) (.cse24 (<= .cse23 127))) (and (or (let ((.cse16 (+ (- 256) .cse23))) (let ((.cse17 (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse16))) (let ((.cse19 (or .cse14 (not (= (mod .cse16 (+ (- 256) (mod (+ .cse22 .cse17) 256))) 0)) (= .cse17 0)))) (let ((.cse1 (or .cse18 (and .cse19 .cse21))) (.cse3 (or .cse18 (and .cse19 .cse20))) (.cse8 (let ((.cse15 (mod .cse17 256))) (or .cse14 (= .cse15 0) (not (= (mod .cse16 .cse15) 0)))))) (and (or (let ((.cse0 (or (and (or .cse5 .cse6 .cse7) .cse8) .cse9))) (and (or (and .cse0 .cse1) .cse2) (or (and .cse3 .cse0) .cse4))) .cse10) (or (let ((.cse11 (or (and .cse12 .cse8) .cse9))) (and (or (and .cse11 .cse1) .cse2) (or .cse4 (and .cse3 .cse11)))) .cse13)))))) .cse24) (or (let ((.cse39 (= .cse23 0)) (.cse38 (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23))) (let ((.cse27 (= .cse22 0)) (.cse31 (let ((.cse40 (mod .cse38 256))) (or (not (= (mod (mod .cse23 .cse40) 256) 0)) .cse14 (= .cse40 0) .cse39))) (.cse25 (or (not (= (mod (mod .cse23 (+ (mod (+ .cse37 .cse38) 256) (- 256))) 256) 0)) .cse14 (= .cse38 0) .cse39))) (and (or (let ((.cse26 (or (and (or .cse27 .cse5 .cse6 .cse7) .cse31) .cse9))) (and (or .cse2 (and (or .cse18 (and .cse25 .cse21)) .cse26)) (or (and .cse26 (or .cse18 (and .cse25 (or .cse27 .cse28 .cse29 .cse5 .cse30)))) .cse4))) .cse10) (or .cse13 (and (or (and (or (and (or .cse27 .cse5 .cse32 .cse33) .cse25) .cse18) (or (and .cse31 (or .cse34 .cse27 .cse35 .cse36 .cse5)) .cse9)) .cse2) (or (and (or .cse9 (and .cse31 .cse12)) (or .cse18 (and .cse25 .cse20))) .cse4)))))) (not .cse24))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true