./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --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 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:34:12,676 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:34:12,751 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:34:12,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:34:12,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:34:12,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:34:12,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:34:12,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:34:12,830 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:34:12,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:34:12,832 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:34:12,833 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:34:12,834 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:34:12,837 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:34:12,837 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:34:12,838 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:34:12,839 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:34:12,843 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:34:12,844 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:34:12,845 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:34:12,846 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:34:12,846 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:34:12,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:34:12,848 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:34:12,849 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:34:12,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:34:12,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:34:12,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:34:12,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:34:12,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:34:12,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:34:12,852 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:34:12,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:34:12,853 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:34:12,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:34:12,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:34:12,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:34:12,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:12,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:34:12,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:34:12,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:34:12,861 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:34:12,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:34:12,862 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:34:12,862 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:34:12,862 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:34:12,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:34:12,863 INFO L153 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_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a [2023-11-23 20:34:13,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:34:13,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:34:13,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:34:13,271 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:34:13,271 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:34:13,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2023-11-23 20:34:16,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:34:16,626 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:34:16,626 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2023-11-23 20:34:16,634 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/data/7cda706ee/d30d60a774144e1d8515e25fb763baaa/FLAGd5d9d48cc [2023-11-23 20:34:16,647 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/data/7cda706ee/d30d60a774144e1d8515e25fb763baaa [2023-11-23 20:34:16,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:34:16,650 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:34:16,651 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:16,651 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:34:16,660 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:34:16,661 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:16,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fdffc0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16, skipping insertion in model container [2023-11-23 20:34:16,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:16,694 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:34:16,863 WARN L240 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_1de89936-4444-49a9-8e08-85060ada93c5/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2023-11-23 20:34:16,895 WARN L240 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_1de89936-4444-49a9-8e08-85060ada93c5/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2023-11-23 20:34:16,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:16,916 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:34:16,929 WARN L240 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_1de89936-4444-49a9-8e08-85060ada93c5/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2023-11-23 20:34:16,944 WARN L240 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_1de89936-4444-49a9-8e08-85060ada93c5/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2023-11-23 20:34:16,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:16,963 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:34:16,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16 WrapperNode [2023-11-23 20:34:16,964 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:16,965 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:16,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:34:16,965 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:34:16,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:16,988 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,015 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 88 [2023-11-23 20:34:17,015 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:17,016 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:34:17,016 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:34:17,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:34:17,026 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,035 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,040 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:34:17,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:34:17,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:34:17,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:34:17,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (1/1) ... [2023-11-23 20:34:17,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:17,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:17,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:34:17,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:34:17,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:34:17,123 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2023-11-23 20:34:17,123 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2023-11-23 20:34:17,123 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-23 20:34:17,123 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-23 20:34:17,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:34:17,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:34:17,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:34:17,192 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:34:17,194 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:34:17,377 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:34:17,451 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:34:17,451 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:34:17,456 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:17 BoogieIcfgContainer [2023-11-23 20:34:17,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:34:17,462 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:34:17,462 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:34:17,465 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:34:17,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:16" (1/3) ... [2023-11-23 20:34:17,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f4608b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:17, skipping insertion in model container [2023-11-23 20:34:17,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:16" (2/3) ... [2023-11-23 20:34:17,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f4608b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:17, skipping insertion in model container [2023-11-23 20:34:17,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:17" (3/3) ... [2023-11-23 20:34:17,467 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_6.i [2023-11-23 20:34:17,489 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:34:17,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:34:17,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:34:17,539 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=LoopHeads, 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;@f378177, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:34:17,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:34:17,544 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) [2023-11-23 20:34:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 20:34:17,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:17,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 20:34:17,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:17,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:17,559 INFO L85 PathProgramCache]: Analyzing trace with hash -584909265, now seen corresponding path program 1 times [2023-11-23 20:34:17,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:17,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046533767] [2023-11-23 20:34:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:17,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:18,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:18,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046533767] [2023-11-23 20:34:18,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046533767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:18,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:18,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:34:18,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618363575] [2023-11-23 20:34:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:34:18,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:34:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:34:18,294 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 5 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2023-11-23 20:34:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:18,440 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-11-23 20:34:18,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:34:18,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 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 [2023-11-23 20:34:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:18,450 INFO L225 Difference]: With dead ends: 37 [2023-11-23 20:34:18,451 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 20:34:18,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:34:18,462 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:18,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 63 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:18,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 20:34:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-23 20:34:18,516 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) [2023-11-23 20:34:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-23 20:34:18,519 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2023-11-23 20:34:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:18,519 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-23 20:34:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2023-11-23 20:34:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-23 20:34:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:34:18,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:18,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:18,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:34:18,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:18,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:18,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1018725074, now seen corresponding path program 1 times [2023-11-23 20:34:18,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:18,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525556373] [2023-11-23 20:34:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:18,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:18,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:34:18,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539002277] [2023-11-23 20:34:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:18,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:18,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:18,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:18,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:34:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:18,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 20:34:18,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:20,209 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse8 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse0 (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse1 (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0)) (.cse6 (<= 128 .cse8)) (.cse3 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse4 (+ .cse8 (- 256))) (.cse5 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse7 (<= .cse8 127))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))) .cse0) (and .cse1 (or (and (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (let ((.cse2 (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|))) (and (not (= .cse2 0)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (= (mod (+ .cse2 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) .cse3) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0) (= (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0))) .cse5)) .cse6) (and .cse7 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse8 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0)))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0))) .cse0) (and .cse1 (or (and .cse6 (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (let ((.cse9 (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|))) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (not (= .cse9 0)) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod (+ .cse9 (* 255 |v_ULTIMATE.start_gcd_test_~b#1_22|)) 256) .cse3) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))) .cse5))) (and .cse7 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse8 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256)) (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_gcd_test_~a#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))))))))) is different from true [2023-11-23 20:34:22,843 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse4 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse3 (<= .cse4 127)) (.cse2 (+ .cse4 (- 256))) (.cse1 (<= 128 .cse4)) (.cse0 (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0)) (.cse5 (<= 0 |c_ULTIMATE.start_main1_~x~0#1|))) (or (and .cse0 (or (and .cse1 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod .cse2 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|)))) (and .cse3 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (= (mod (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) 0) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|)))))) (and (or (and .cse3 (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0) (= (mod (mod .cse4 |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) 0)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0) (= (mod .cse2 |v_ULTIMATE.start_gcd_test_~b#1_22|) 0))) .cse1)) .cse0) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~b#1_22| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (not (= |v_ULTIMATE.start_gcd_test_~b#1_22| 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~b#1_22|))) .cse5) (and (exists ((|v_ULTIMATE.start_gcd_test_~b#1_22| Int)) (and (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~b#1_22|)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~b#1_22|) (<= (+ |v_ULTIMATE.start_gcd_test_~b#1_22| 1) 0))) .cse5)))) is different from true [2023-11-23 20:34:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-23 20:34:23,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:24,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:24,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525556373] [2023-11-23 20:34:24,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:34:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539002277] [2023-11-23 20:34:24,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539002277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:24,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673753513] [2023-11-23 20:34:24,698 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 20:34:24,699 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:24,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:24,709 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:24,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:25,467 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:26,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main1_~x~0#1|) (<= (+ |ULTIMATE.start_main1_~x~0#1| 1) |ULTIMATE.start_main1_~g~0#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 (+ |ULTIMATE.start_main1_~y~0#1| 128)))' at error location [2023-11-23 20:34:26,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:34:26,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:34:26,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-23 20:34:26,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45794666] [2023-11-23 20:34:26,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:26,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 20:34:26,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:26,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 20:34:26,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=129, Unknown=2, NotChecked=46, Total=210 [2023-11-23 20:34:26,524 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.2) 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) [2023-11-23 20:34:33,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:33,674 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-11-23 20:34:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:34:33,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.2) 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 [2023-11-23 20:34:33,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:33,676 INFO L225 Difference]: With dead ends: 29 [2023-11-23 20:34:33,676 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 20:34:33,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=51, Invalid=223, Unknown=6, NotChecked=62, Total=342 [2023-11-23 20:34:33,679 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:33,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2023-11-23 20:34:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 20:34:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-23 20:34:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 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) [2023-11-23 20:34:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-11-23 20:34:33,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 7 [2023-11-23 20:34:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:33,690 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-11-23 20:34:33,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.2) 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) [2023-11-23 20:34:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-11-23 20:34:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:34:33,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:33,692 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:33,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:34:33,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:33,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:33,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2117450257, now seen corresponding path program 2 times [2023-11-23 20:34:33,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:33,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71210735] [2023-11-23 20:34:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:33,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:34:33,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426030813] [2023-11-23 20:34:33,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:34:33,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:33,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:33,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1de89936-4444-49a9-8e08-85060ada93c5/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:34:34,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 20:34:34,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:34:34,086 WARN L260 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 20:34:34,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:55,515 WARN L293 SmtUtils]: Spent 11.68s on a formula simplification. DAG size of input: 113 DAG size of output: 110 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-23 20:35:17,896 WARN L854 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (let ((.cse6 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse11 (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse1 (<= .cse6 127)) (.cse21 (<= 128 .cse6)) (.cse48 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse18 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse20 (+ .cse6 (- 256))) (.cse0 (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0))) (or (and (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0) (let ((.cse2 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256))) (or (and .cse0 .cse1 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse4 (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse5 (mod .cse4 256))) (let ((.cse3 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse5))) (and (= .cse2 (mod (+ .cse3 (* 255 .cse4)) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (not (= .cse5 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse5 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= 128 (mod (+ .cse3 .cse4) 256)))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse8 (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse10 (mod .cse8 256))) (let ((.cse9 (mod .cse10 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse10))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= .cse2 (mod (+ .cse7 (* 255 .cse8)) 256)) (= (mod .cse9 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 128 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9) 256)) (not (= .cse7 0)) (<= (mod (+ .cse7 .cse8) 256) 127)))))) .cse11) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse13 (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse14 (mod .cse13 256))) (let ((.cse12 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse14))) (and (<= 128 (mod (+ .cse12 .cse13) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= .cse2 (mod (+ .cse12 (* 255 .cse13)) 256)) (not (= .cse14 0)) (= (mod (mod .cse14 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|)))))) .cse11) (and .cse0 (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse16 (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse19 (+ (- 256) (mod (+ .cse16 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)))) (let ((.cse17 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse19)) (.cse15 (mod .cse19 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (not (= .cse15 0)) (<= 128 (mod (+ (* 255 .cse16) .cse17 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256)) (= .cse2 (mod (+ .cse16 .cse17 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)) (= .cse18 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse15) 256))))))) .cse21) (and .cse21 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse22 (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse25 (+ (- 256) (mod (+ .cse22 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)))) (let ((.cse23 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse25)) (.cse24 (mod .cse25 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (mod (+ (* 255 .cse22) .cse23 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256) 127) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (not (= .cse24 0)) (= .cse2 (mod (+ .cse22 .cse23 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)) (= .cse18 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse24) 256)))))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse27 (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse29 (mod .cse27 256))) (let ((.cse26 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse29)) (.cse28 (mod .cse29 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= .cse2 (mod (+ .cse26 (* 255 .cse27)) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (<= (mod (+ .cse26 .cse27) 256) 127) (not (= .cse26 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse28 256)) (<= 128 (mod (+ .cse28 |c_ULTIMATE.start_gcd_test_~a#1|) 256))))))) .cse0 .cse1) (and (or (and .cse0 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse31 (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse32 (mod .cse31 256))) (let ((.cse30 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse32))) (and (= .cse2 (mod (+ .cse30 (* 255 .cse31)) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (<= (mod (+ .cse30 .cse31) 256) 127) (not (= .cse30 0)) (= (mod .cse32 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))))) .cse1) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse34 (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse35 (mod .cse34 256))) (let ((.cse33 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse35))) (and (<= 128 (mod (+ .cse33 .cse34) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= .cse2 (mod (+ .cse33 (* 255 .cse34)) 256)) (not (= .cse35 0)) (= (mod .cse35 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))))) .cse11) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse37 (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse38 (mod .cse37 256))) (let ((.cse36 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse38))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= .cse2 (mod (+ .cse36 (* 255 .cse37)) 256)) (not (= .cse36 0)) (<= (mod (+ .cse36 .cse37) 256) 127) (= (mod .cse38 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))))) .cse11) (and .cse0 (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse40 (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse41 (mod .cse40 256))) (let ((.cse39 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse41))) (and (= .cse2 (mod (+ .cse39 (* 255 .cse40)) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (not (= .cse41 0)) (<= 128 (mod (+ .cse39 .cse40) 256)) (= (mod .cse41 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))))) .cse1) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse43 (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse44 (+ (- 256) (mod (+ .cse43 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)))) (let ((.cse42 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse44))) (and (not (= .cse42 0)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (mod (+ (* 255 .cse43) .cse42 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256) 127) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= (mod .cse44 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= .cse2 (mod (+ .cse43 .cse42 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256))))))) .cse21) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse45 (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse47 (+ (- 256) (mod (+ .cse45 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)))) (let ((.cse46 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse47))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (<= 128 (mod (+ (* 255 .cse45) .cse46 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256)) (= (mod .cse47 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= .cse2 (mod (+ .cse45 .cse46 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)) (not (= .cse45 0))))))) .cse21)))) (<= 128 (mod |c_ULTIMATE.start_gcd_test_~a#1| 256)) .cse48)))) (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse49 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|) 256))) (and (not (= .cse49 0)) (= (mod (mod .cse49 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~a#1_32| 127) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse49) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_32|)))) .cse11) (and (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse50 (mod (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_32| 127) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse50) 256)) (not (= .cse50 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse50 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_32|)))) .cse1) (and .cse21 (let ((.cse52 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse51 (+ (- 256) (mod (+ (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|) (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256)))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse51) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_32| 127) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_32|) (= (mod .cse51 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))) .cse48 (<= 128 (mod .cse52 256))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse53 (+ (- 256) (mod (+ (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|) (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256)))) (let ((.cse54 (mod .cse53 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse53) 256)) (not (= .cse54 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_32| 127) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_32|) (= .cse18 (mod (+ .cse52 .cse54) 256)))))))))) .cse0))))))) is different from false [2023-11-23 20:35:19,928 WARN L876 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (let ((.cse6 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse11 (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse1 (<= .cse6 127)) (.cse21 (<= 128 .cse6)) (.cse48 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse18 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse20 (+ .cse6 (- 256))) (.cse0 (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0))) (or (and (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0) (let ((.cse2 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256))) (or (and .cse0 .cse1 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse4 (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse5 (mod .cse4 256))) (let ((.cse3 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse5))) (and (= .cse2 (mod (+ .cse3 (* 255 .cse4)) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (not (= .cse5 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse5 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= 128 (mod (+ .cse3 .cse4) 256)))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse8 (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse10 (mod .cse8 256))) (let ((.cse9 (mod .cse10 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse10))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= .cse2 (mod (+ .cse7 (* 255 .cse8)) 256)) (= (mod .cse9 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 128 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9) 256)) (not (= .cse7 0)) (<= (mod (+ .cse7 .cse8) 256) 127)))))) .cse11) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse13 (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse14 (mod .cse13 256))) (let ((.cse12 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse14))) (and (<= 128 (mod (+ .cse12 .cse13) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= .cse2 (mod (+ .cse12 (* 255 .cse13)) 256)) (not (= .cse14 0)) (= (mod (mod .cse14 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|)))))) .cse11) (and .cse0 (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse16 (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse19 (+ (- 256) (mod (+ .cse16 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)))) (let ((.cse17 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse19)) (.cse15 (mod .cse19 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (not (= .cse15 0)) (<= 128 (mod (+ (* 255 .cse16) .cse17 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256)) (= .cse2 (mod (+ .cse16 .cse17 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)) (= .cse18 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse15) 256))))))) .cse21) (and .cse21 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse22 (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse25 (+ (- 256) (mod (+ .cse22 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)))) (let ((.cse23 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse25)) (.cse24 (mod .cse25 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (mod (+ (* 255 .cse22) .cse23 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256) 127) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (not (= .cse24 0)) (= .cse2 (mod (+ .cse22 .cse23 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)) (= .cse18 (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse24) 256)))))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse27 (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse29 (mod .cse27 256))) (let ((.cse26 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse29)) (.cse28 (mod .cse29 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= .cse2 (mod (+ .cse26 (* 255 .cse27)) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (<= (mod (+ .cse26 .cse27) 256) 127) (not (= .cse26 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod .cse28 256)) (<= 128 (mod (+ .cse28 |c_ULTIMATE.start_gcd_test_~a#1|) 256))))))) .cse0 .cse1) (and (or (and .cse0 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse31 (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse32 (mod .cse31 256))) (let ((.cse30 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse32))) (and (= .cse2 (mod (+ .cse30 (* 255 .cse31)) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (<= (mod (+ .cse30 .cse31) 256) 127) (not (= .cse30 0)) (= (mod .cse32 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))))) .cse1) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse34 (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse35 (mod .cse34 256))) (let ((.cse33 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse35))) (and (<= 128 (mod (+ .cse33 .cse34) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= .cse2 (mod (+ .cse33 (* 255 .cse34)) 256)) (not (= .cse35 0)) (= (mod .cse35 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))))) .cse11) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse37 (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse38 (mod .cse37 256))) (let ((.cse36 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse38))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= .cse2 (mod (+ .cse36 (* 255 .cse37)) 256)) (not (= .cse36 0)) (<= (mod (+ .cse36 .cse37) 256) 127) (= (mod .cse38 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))))) .cse11) (and .cse0 (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse40 (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse41 (mod .cse40 256))) (let ((.cse39 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse41))) (and (= .cse2 (mod (+ .cse39 (* 255 .cse40)) 256)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (not (= .cse41 0)) (<= 128 (mod (+ .cse39 .cse40) 256)) (= (mod .cse41 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))))) .cse1) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse43 (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse44 (+ (- 256) (mod (+ .cse43 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)))) (let ((.cse42 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse44))) (and (not (= .cse42 0)) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (mod (+ (* 255 .cse43) .cse42 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256) 127) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (= (mod .cse44 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= .cse2 (mod (+ .cse43 .cse42 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256))))))) .cse21) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse45 (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|))) (let ((.cse47 (+ (- 256) (mod (+ .cse45 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)))) (let ((.cse46 (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse47))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_32|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_32| 1) 0) (<= 128 (mod (+ (* 255 .cse45) .cse46 (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256)) (= (mod .cse47 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= .cse2 (mod (+ .cse45 .cse46 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256)) (not (= .cse45 0))))))) .cse21)))) (<= 128 (mod |c_ULTIMATE.start_gcd_test_~a#1| 256)) .cse48)))) (and (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse49 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_32|) 256))) (and (not (= .cse49 0)) (= (mod (mod .cse49 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |v_ULTIMATE.start_gcd_test_~a#1_32| 127) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse49) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_32|)))) .cse11) (and (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse50 (mod (mod .cse6 |v_ULTIMATE.start_gcd_test_~a#1_32|) 256))) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_32| 127) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse50) 256)) (not (= .cse50 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse50 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_32|)))) .cse1) (and .cse21 (let ((.cse52 (* |c_ULTIMATE.start_gcd_test_~a#1| 255))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse51 (+ (- 256) (mod (+ (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|) (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256)))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse51) 256)) (<= |v_ULTIMATE.start_gcd_test_~a#1_32| 127) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_32|) (= (mod .cse51 |c_ULTIMATE.start_gcd_test_~a#1|) 0)))) .cse48 (<= 128 (mod .cse52 256))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_32| Int)) (let ((.cse53 (+ (- 256) (mod (+ (mod .cse20 |v_ULTIMATE.start_gcd_test_~a#1_32|) (* 255 |v_ULTIMATE.start_gcd_test_~a#1_32|)) 256)))) (let ((.cse54 (mod .cse53 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_32| .cse53) 256)) (not (= .cse54 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_32| 127) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_32|) (= .cse18 (mod (+ .cse52 .cse54) 256)))))))))) .cse0))))))) is different from true