./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7 --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 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:35:54,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:35:54,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:35:54,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:35:54,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:35:54,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:35:54,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:35:54,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:35:54,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:35:54,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:35:54,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:35:54,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:35:54,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:35:54,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:35:54,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:35:54,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:35:54,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:35:54,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:35:54,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:35:54,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:35:54,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:35:54,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:35:54,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:35:54,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:35:55,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:35:55,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:35:55,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:35:55,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:35:55,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:35:55,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:35:55,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:35:55,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:35:55,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:35:55,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:35:55,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:35:55,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:35:55,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:35:55,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:35:55,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:35:55,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:35:55,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:35:55,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:35:55,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:35:55,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:35:55,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:35:55,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:35:55,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:35:55,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:35:55,077 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:35:55,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:35:55,078 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:35:55,078 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:35:55,079 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:35:55,079 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:35:55,080 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:35:55,080 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:35:55,080 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:35:55,080 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:35:55,081 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:35:55,081 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:35:55,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:35:55,082 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:35:55,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:35:55,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:35:55,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:35:55,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:35:55,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:35:55,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:35:55,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:35:55,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:35:55,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:35:55,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:35:55,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:35:55,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:35:55,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:35:55,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:35:55,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:35:55,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:35:55,087 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:35:55,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:35:55,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:35:55,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:35:55,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:35:55,089 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 [2021-11-25 18:35:55,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:35:55,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:35:55,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:35:55,373 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:35:55,374 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:35:55,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/bitvector/gcd_3.c [2021-11-25 18:35:55,470 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/data/99df0765e/bca67ad67f824896b73331e3bfcbb88b/FLAGb930e8902 [2021-11-25 18:35:55,915 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:35:55,915 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/sv-benchmarks/c/bitvector/gcd_3.c [2021-11-25 18:35:55,921 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/data/99df0765e/bca67ad67f824896b73331e3bfcbb88b/FLAGb930e8902 [2021-11-25 18:35:56,308 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/data/99df0765e/bca67ad67f824896b73331e3bfcbb88b [2021-11-25 18:35:56,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:35:56,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:35:56,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:35:56,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:35:56,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:35:56,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ff76f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56, skipping insertion in model container [2021-11-25 18:35:56,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:35:56,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:35:56,528 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2021-11-25 18:35:56,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:35:56,565 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:35:56,574 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2021-11-25 18:35:56,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:35:56,592 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:35:56,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56 WrapperNode [2021-11-25 18:35:56,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:35:56,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:35:56,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:35:56,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:35:56,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,631 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 47 [2021-11-25 18:35:56,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:35:56,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:35:56,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:35:56,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:35:56,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:35:56,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:35:56,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:35:56,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:35:56,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (1/1) ... [2021-11-25 18:35:56,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:35:56,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:35:56,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:35:56,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:35:56,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:35:56,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:35:56,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:35:56,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:35:56,840 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:35:56,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:35:57,012 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:35:57,047 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:35:57,048 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:35:57,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:35:57 BoogieIcfgContainer [2021-11-25 18:35:57,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:35:57,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:35:57,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:35:57,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:35:57,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:35:56" (1/3) ... [2021-11-25 18:35:57,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fc5c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:35:57, skipping insertion in model container [2021-11-25 18:35:57,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:56" (2/3) ... [2021-11-25 18:35:57,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fc5c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:35:57, skipping insertion in model container [2021-11-25 18:35:57,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:35:57" (3/3) ... [2021-11-25 18:35:57,059 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3.c [2021-11-25 18:35:57,065 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:35:57,065 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:35:57,113 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:35:57,121 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:35:57,121 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:35:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) 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) [2021-11-25 18:35:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 18:35:57,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:57,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 18:35:57,142 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:57,148 INFO L85 PathProgramCache]: Analyzing trace with hash 84816067, now seen corresponding path program 1 times [2021-11-25 18:35:57,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:57,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023127462] [2021-11-25 18:35:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:57,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:35:57,377 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:57,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023127462] [2021-11-25 18:35:57,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023127462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:57,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:57,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:35:57,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657393138] [2021-11-25 18:35:57,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:57,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:57,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:57,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:57,416 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) 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) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:35:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:57,591 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-11-25 18:35:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:35:57,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2021-11-25 18:35:57,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:57,604 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:35:57,604 INFO L226 Difference]: Without dead ends: 7 [2021-11-25 18:35:57,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:35:57,616 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:57,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:35:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-25 18:35:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-25 18:35:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:35:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-11-25 18:35:57,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-11-25 18:35:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:57,652 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-11-25 18:35:57,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:35:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-11-25 18:35:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:35:57,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:57,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:35:57,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:35:57,655 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:57,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1696327067, now seen corresponding path program 1 times [2021-11-25 18:35:57,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233392458] [2021-11-25 18:35:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:57,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:57,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:35:57,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911395470] [2021-11-25 18:35:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:57,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:57,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:35:57,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:35:57,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:35:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:57,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 18:35:57,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:09,241 WARN L227 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 84 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:36:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:16,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:20,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:20,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233392458] [2021-11-25 18:36:20,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:20,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911395470] [2021-11-25 18:36:20,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911395470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:36:20,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771470408] [2021-11-25 18:36:20,795 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 18:36:20,796 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:20,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:20,810 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:20,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:21,036 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:31,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~b#1| 128)) (< 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= |ULTIMATE.start_main_~y~0#1| 127) (= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_main_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main_~y~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_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:31,444 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:31,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:36:31,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-25 18:36:31,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115013424] [2021-11-25 18:36:31,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:31,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:36:31,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:36:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=119, Unknown=4, NotChecked=0, Total=156 [2021-11-25 18:36:31,449 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:36:34,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-25 18:37:27,105 WARN L227 SmtUtils]: Spent 45.97s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:37:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:27,212 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-11-25 18:37:27,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:37:27,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 18:37:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:27,213 INFO L225 Difference]: With dead ends: 12 [2021-11-25 18:37:27,214 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 18:37:27,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 78.5s TimeCoverageRelationStatistics Valid=39, Invalid=138, Unknown=5, NotChecked=0, Total=182 [2021-11-25 18:37:27,217 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:27,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 1 Unknown, 10 Unchecked, 3.3s Time] [2021-11-25 18:37:27,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 18:37:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 18:37:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-25 18:37:27,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-25 18:37:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:27,223 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-25 18:37:27,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:37:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-25 18:37:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:37:27,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:27,225 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-25 18:37:27,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:27,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:27,427 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1077189373, now seen corresponding path program 2 times [2021-11-25 18:37:27,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:27,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009634457] [2021-11-25 18:37:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:27,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:27,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:27,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228878864] [2021-11-25 18:37:27,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:37:27,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:27,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:27,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:27,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:37:27,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:37:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:37:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:37:27,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:04,665 WARN L227 SmtUtils]: Spent 8.64s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:38:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:38:38,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:39:09,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:09,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009634457] [2021-11-25 18:39:09,572 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:39:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228878864] [2021-11-25 18:39:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228878864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:39:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184345895] [2021-11-25 18:39:09,575 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 18:39:09,575 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:39:09,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:39:09,576 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:39:09,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:39:10,012 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:39:28,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '182#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~b#1| 128)) (< 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= |ULTIMATE.start_main_~y~0#1| 127) (= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (<= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_main_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main_~y~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_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:39:28,540 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:39:28,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:39:28,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-25 18:39:28,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502029784] [2021-11-25 18:39:28,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:39:28,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:39:28,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:28,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:39:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=150, Unknown=15, NotChecked=0, Total=210 [2021-11-25 18:39:28,544 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:39:31,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:31,400 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-11-25 18:39:31,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:39:31,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:39:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:31,402 INFO L225 Difference]: With dead ends: 16 [2021-11-25 18:39:31,402 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 18:39:31,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 72.8s TimeCoverageRelationStatistics Valid=50, Invalid=174, Unknown=16, NotChecked=0, Total=240 [2021-11-25 18:39:31,404 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:31,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2021-11-25 18:39:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 18:39:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 18:39:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2021-11-25 18:39:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-25 18:39:31,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-11-25 18:39:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:31,411 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-25 18:39:31,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:39:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-25 18:39:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:39:31,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:31,412 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2021-11-25 18:39:31,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:39:31,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:31,613 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:39:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:31,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1068552677, now seen corresponding path program 3 times [2021-11-25 18:39:31,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:31,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39141242] [2021-11-25 18:39:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:31,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:31,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:39:31,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483747108] [2021-11-25 18:39:31,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:39:31,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:31,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:31,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:31,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4973dc-10c9-4681-ba31-103dda535bb8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:39:31,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:39:31,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:39:31,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:39:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:00,277 WARN L227 SmtUtils]: Spent 20.87s on a formula simplification. DAG size of input: 81 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:42:54,924 WARN L227 SmtUtils]: Spent 5.89s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:49:29,092 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|ULTIMATE.start_gcd_test_#in~b#1| Int)) (and (let ((.cse6 (mod (* |c_ULTIMATE.start_main_~x~0#1| 255) 256))) (let ((.cse3 (< |c_ULTIMATE.start_main_~x~0#1| 0)) (.cse5 (<= .cse6 127)) (.cse7 (< 127 .cse6)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 255)) (.cse11 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse25 (* |ULTIMATE.start_gcd_test_#in~b#1| 255)) (.cse13 (+ .cse6 (- 256))) (.cse1 (<= 0 |c_ULTIMATE.start_main_~x~0#1|))) (or (and (let ((.cse0 (mod .cse25 256))) (or (and (<= .cse0 127) (or (let ((.cse2 (mod (mod |c_ULTIMATE.start_main_~x~0#1| .cse0) 256))) (and .cse1 (not (= .cse2 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse0 .cse2) 256)))) (and .cse3 (or (let ((.cse4 (mod (mod .cse6 .cse0) 256))) (and (not (= .cse4 0)) .cse5 (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse4 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod .cse0 .cse4) 256)))) (let ((.cse12 (+ (mod (+ (* .cse0 255) (mod .cse13 .cse0)) 256) (- 256)))) (and .cse7 (let ((.cse9 (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse8 (= .cse9 0))) (or (and .cse8 (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse9 256))) (and (not .cse8) (= (mod (+ .cse9 .cse10) 256) .cse11))))) (= (mod (mod .cse0 .cse12) 256) |c_ULTIMATE.start_gcd_test_~a#1|))))))) (and (< 127 .cse0) (let ((.cse16 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse17 (+ .cse0 (- 256)))) (or (and .cse3 (or (let ((.cse14 (mod (mod .cse6 .cse17) 256))) (let ((.cse15 (mod .cse17 .cse14))) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse14 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse14 0)) (not (= .cse15 0)) (= .cse16 (mod (+ (* .cse14 255) .cse15) 256)) .cse5))) (let ((.cse18 (mod (+ .cse0 (mod .cse13 .cse17)) 256))) (let ((.cse22 (+ (- 256) .cse18))) (let ((.cse19 (mod .cse17 .cse22))) (and .cse7 (= (mod (+ .cse18 .cse19) 256) .cse16) (not (= .cse19 0)) (let ((.cse21 (mod .cse22 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse20 (= .cse21 0))) (or (and (not .cse20) (= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse21) 256) .cse11)) (and .cse20 (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse21 256)))))))))))) (let ((.cse24 (mod (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 256))) (let ((.cse23 (mod .cse17 .cse24))) (and .cse1 (not (= .cse23 0)) (not (= .cse24 0)) (= .cse16 (mod (+ (* .cse24 255) .cse23) 256)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse24 |c_ULTIMATE.start_gcd_test_~a#1|) 256)))))))))) (< |ULTIMATE.start_gcd_test_#in~b#1| 0)) (and (or (and .cse3 (or (let ((.cse26 (mod (mod .cse6 |ULTIMATE.start_gcd_test_#in~b#1|) 256))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |ULTIMATE.start_gcd_test_#in~b#1| .cse26) 256)) (not (= .cse26 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse26 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) .cse5)) (let ((.cse29 (+ (mod (+ .cse25 (mod .cse13 |ULTIMATE.start_gcd_test_#in~b#1|)) 256) (- 256)))) (and .cse7 (let ((.cse27 (mod .cse29 |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse28 (= .cse27 0))) (or (and (= (mod (+ .cse27 .cse10) 256) .cse11) (not .cse28)) (and .cse28 (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse27 256)))))) (= (mod (mod |ULTIMATE.start_gcd_test_#in~b#1| .cse29) 256) |c_ULTIMATE.start_gcd_test_~a#1|))))) (let ((.cse30 (mod (mod |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_gcd_test_#in~b#1|) 256))) (and .cse1 (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse30 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (not (= .cse30 0)) (= (mod (mod |ULTIMATE.start_gcd_test_#in~b#1| .cse30) 256) |c_ULTIMATE.start_gcd_test_~a#1|)))) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|))))) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127)))) is different from false