./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 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_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/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_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/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_e02c39b9-4323-4016-a51c-c14d45f3f435/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 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:49,809 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:49,938 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:32:49,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:49,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:49,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:49,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:49,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:49,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:49,999 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:49,999 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:50,000 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:50,001 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:50,003 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:50,003 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:50,004 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:50,004 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:50,004 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:50,005 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:50,005 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:50,007 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:50,008 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:50,009 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:50,009 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:32:50,010 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:32:50,010 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:50,011 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:32:50,011 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:50,011 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:32:50,012 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:50,013 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:32:50,013 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:32:50,014 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:32:50,014 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:50,014 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:50,014 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:50,015 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:50,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:50,016 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:50,016 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:50,016 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:32:50,017 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:50,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:50,017 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:50,018 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:32:50,018 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:50,018 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:50,018 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_e02c39b9-4323-4016-a51c-c14d45f3f435/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 [2023-11-23 20:32:50,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:50,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:50,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:50,414 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:50,414 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:50,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/bitvector/gcd_3.c [2023-11-23 20:32:53,659 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:53,881 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:53,881 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/sv-benchmarks/c/bitvector/gcd_3.c [2023-11-23 20:32:53,890 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/data/ed87db3f6/6c0227fe50524204a613b2af1acf3e11/FLAG51085e266 [2023-11-23 20:32:53,914 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/data/ed87db3f6/6c0227fe50524204a613b2af1acf3e11 [2023-11-23 20:32:53,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:53,923 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:53,927 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:53,927 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:53,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:53,934 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:53" (1/1) ... [2023-11-23 20:32:53,935 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@771d7c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:53, skipping insertion in model container [2023-11-23 20:32:53,935 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:53" (1/1) ... [2023-11-23 20:32:53,962 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:54,129 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_e02c39b9-4323-4016-a51c-c14d45f3f435/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2023-11-23 20:32:54,145 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:54,158 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:32:54,175 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_e02c39b9-4323-4016-a51c-c14d45f3f435/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2023-11-23 20:32:54,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:54,196 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:32:54,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54 WrapperNode [2023-11-23 20:32:54,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:54,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:54,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:32:54,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:32:54,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,235 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2023-11-23 20:32:54,236 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:54,236 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:32:54,237 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:32:54,237 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:32:54,246 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,248 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,249 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,252 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,256 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,257 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,258 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,260 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:32:54,261 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:32:54,261 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:32:54,261 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:32:54,262 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (1/1) ... [2023-11-23 20:32:54,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:54,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:54,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:32:54,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:32:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:32:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:32:54,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:32:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:32:54,406 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:32:54,408 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:32:54,580 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:32:54,661 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:32:54,661 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:32:54,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:54 BoogieIcfgContainer [2023-11-23 20:32:54,663 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:32:54,700 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:32:54,700 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:32:54,704 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:32:54,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:32:53" (1/3) ... [2023-11-23 20:32:54,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64da5de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:54, skipping insertion in model container [2023-11-23 20:32:54,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:54" (2/3) ... [2023-11-23 20:32:54,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64da5de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:54, skipping insertion in model container [2023-11-23 20:32:54,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:54" (3/3) ... [2023-11-23 20:32:54,707 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3.c [2023-11-23 20:32:54,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:32:54,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:32:54,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:32:54,794 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;@74af16b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:32:54,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:32:54,799 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) [2023-11-23 20:32:54,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:32:54,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:54,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 20:32:54,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:54,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash 84816067, now seen corresponding path program 1 times [2023-11-23 20:32:54,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:54,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715423260] [2023-11-23 20:32:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:54,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:55,418 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 20:32:55,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:55,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715423260] [2023-11-23 20:32:55,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715423260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:55,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:55,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:32:55,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231509216] [2023-11-23 20:32:55,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:55,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:55,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:55,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:55,476 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) [2023-11-23 20:32:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:55,579 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2023-11-23 20:32:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:32:55,582 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 [2023-11-23 20:32:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:55,591 INFO L225 Difference]: With dead ends: 19 [2023-11-23 20:32:55,591 INFO L226 Difference]: Without dead ends: 7 [2023-11-23 20:32:55,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 20:32:55,600 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:55,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:55,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-23 20:32:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-23 20:32:55,632 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) [2023-11-23 20:32:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-11-23 20:32:55,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-11-23 20:32:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:55,636 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-11-23 20:32:55,636 INFO L496 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) [2023-11-23 20:32:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-11-23 20:32:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 20:32:55,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:55,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 20:32:55,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:32:55,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:55,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1696327067, now seen corresponding path program 1 times [2023-11-23 20:32:55,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:55,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731050293] [2023-11-23 20:32:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:55,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:32:55,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144376019] [2023-11-23 20:32:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:55,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:55,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:55,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:55,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:32:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:55,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 20:32:55,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:03,177 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 20:33:03,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:05,042 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 20:33:05,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:05,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731050293] [2023-11-23 20:33:05,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:05,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144376019] [2023-11-23 20:33:05,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144376019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:05,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948925125] [2023-11-23 20:33:05,065 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-23 20:33:05,065 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:05,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:05,075 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:05,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:33:06,374 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:33:06,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '89#(and (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~g~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~y~0#1| 127) (= |ULTIMATE.start_main_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main_~g~0#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_main_~y~0#1| 128)) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-23 20:33:06,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:33:06,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:33:06,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-23 20:33:06,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629672754] [2023-11-23 20:33:06,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:33:06,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 20:33:06,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:06,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 20:33:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:33:06,933 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 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) [2023-11-23 20:33:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:11,446 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-23 20:33:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 20:33:11,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 20:33:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:11,448 INFO L225 Difference]: With dead ends: 16 [2023-11-23 20:33:11,448 INFO L226 Difference]: Without dead ends: 10 [2023-11-23 20:33:11,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:33:11,451 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:11,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 20:33:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-23 20:33:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-23 20:33:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2023-11-23 20:33:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-23 20:33:11,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2023-11-23 20:33:11,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:11,460 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-23 20:33:11,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 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) [2023-11-23 20:33:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-23 20:33:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:33:11,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:11,462 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-23 20:33:11,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:33:11,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:11,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:11,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:11,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1072920253, now seen corresponding path program 2 times [2023-11-23 20:33:11,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:11,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921276021] [2023-11-23 20:33:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:11,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:11,694 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:11,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076351638] [2023-11-23 20:33:11,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:33:11,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:11,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:11,703 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:11,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e02c39b9-4323-4016-a51c-c14d45f3f435/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:33:11,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 20:33:11,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:33:11,883 WARN L260 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 20:33:11,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:30,908 WARN L293 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 104 DAG size of output: 91 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-23 20:33:37,606 WARN L854 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (let ((.cse15 (mod (* |c_ULTIMATE.start_main_~x~0#1| 255) 256))) (let ((.cse1 (<= 0 |c_ULTIMATE.start_main_~x~0#1|)) (.cse8 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse13 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse4 (+ (- 256) .cse15)) (.cse5 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse16 (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0)) (.cse10 (<= 128 .cse15)) (.cse2 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (<= (+ |c_ULTIMATE.start_main_~x~0#1| 1) 0)) (.cse17 (<= .cse15 127))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (and (= (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256)) (not (= .cse0 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (<= |v_ULTIMATE.start_gcd_test_~a#1_33| 127)))) .cse1 .cse2) (and (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse3 (+ (- 256) (mod (+ (mod .cse4 |v_ULTIMATE.start_gcd_test_~a#1_33|) (* 255 |v_ULTIMATE.start_gcd_test_~a#1_33|)) 256)))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse3) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (= (mod .cse3 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_33| 127)))) .cse5) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse6 (+ (- 256) (mod (+ (mod .cse4 |v_ULTIMATE.start_gcd_test_~a#1_33|) (* 255 |v_ULTIMATE.start_gcd_test_~a#1_33|)) 256)))) (let ((.cse7 (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse6) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (not (= .cse7 0)) (= (mod (+ (* |c_ULTIMATE.start_gcd_test_~a#1| 255) .cse7) 256) .cse8) (<= |v_ULTIMATE.start_gcd_test_~a#1_33| 127)))))) .cse2 .cse9 .cse10) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse14 (mod .cse15 |v_ULTIMATE.start_gcd_test_~a#1_33|))) (let ((.cse12 (mod .cse14 256))) (let ((.cse11 (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse12))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_33|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_33| 1) 0) (not (= .cse11 0)) (not (= .cse12 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= .cse13 (mod (+ .cse11 (* .cse14 255)) 256))))))) .cse16 .cse9 .cse17) (and .cse1 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse20 (mod |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_33|))) (let ((.cse18 (mod .cse20 256))) (let ((.cse19 (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse18))) (and (= (mod (mod .cse18 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_33|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_33| 1) 0) (not (= .cse19 0)) (not (= .cse18 0)) (= .cse13 (mod (+ (* 255 .cse20) .cse19) 256))))))) .cse16) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse22 (mod .cse4 |v_ULTIMATE.start_gcd_test_~a#1_33|))) (let ((.cse23 (+ (- 256) (mod (+ .cse22 |v_ULTIMATE.start_gcd_test_~a#1_33|) 256)))) (let ((.cse21 (mod .cse23 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_33|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_33| 1) 0) (= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse21) 256) .cse8) (not (= .cse21 0)) (= .cse13 (mod (+ .cse22 (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse23) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse26 (mod .cse4 |v_ULTIMATE.start_gcd_test_~a#1_33|))) (let ((.cse25 (+ (- 256) (mod (+ .cse26 |v_ULTIMATE.start_gcd_test_~a#1_33|) 256)))) (let ((.cse24 (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse25))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_33|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_33| 1) 0) (not (= .cse24 0)) (= (mod .cse25 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= .cse13 (mod (+ .cse26 .cse24 |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))))))) .cse5)) .cse16 .cse9 .cse10) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse27 (mod (mod .cse15 |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse27) 256)) (not (= .cse27 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse27 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (<= |v_ULTIMATE.start_gcd_test_~a#1_33| 127)))) .cse2 .cse9 .cse17))))) is different from false [2023-11-23 20:33:39,642 WARN L876 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (let ((.cse15 (mod (* |c_ULTIMATE.start_main_~x~0#1| 255) 256))) (let ((.cse1 (<= 0 |c_ULTIMATE.start_main_~x~0#1|)) (.cse8 (+ |c_ULTIMATE.start_gcd_test_~b#1| 256)) (.cse13 (+ |c_ULTIMATE.start_gcd_test_~a#1| 256)) (.cse4 (+ (- 256) .cse15)) (.cse5 (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse16 (<= (+ |c_ULTIMATE.start_gcd_test_~a#1| 1) 0)) (.cse10 (<= 128 .cse15)) (.cse2 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse9 (<= (+ |c_ULTIMATE.start_main_~x~0#1| 1) 0)) (.cse17 (<= .cse15 127))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse0 (mod (mod |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (and (= (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse0) 256)) (not (= .cse0 0)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (<= |v_ULTIMATE.start_gcd_test_~a#1_33| 127)))) .cse1 .cse2) (and (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse3 (+ (- 256) (mod (+ (mod .cse4 |v_ULTIMATE.start_gcd_test_~a#1_33|) (* 255 |v_ULTIMATE.start_gcd_test_~a#1_33|)) 256)))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse3) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (= (mod .cse3 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_33| 127)))) .cse5) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse6 (+ (- 256) (mod (+ (mod .cse4 |v_ULTIMATE.start_gcd_test_~a#1_33|) (* 255 |v_ULTIMATE.start_gcd_test_~a#1_33|)) 256)))) (let ((.cse7 (mod .cse6 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse6) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (not (= .cse7 0)) (= (mod (+ (* |c_ULTIMATE.start_gcd_test_~a#1| 255) .cse7) 256) .cse8) (<= |v_ULTIMATE.start_gcd_test_~a#1_33| 127)))))) .cse2 .cse9 .cse10) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse14 (mod .cse15 |v_ULTIMATE.start_gcd_test_~a#1_33|))) (let ((.cse12 (mod .cse14 256))) (let ((.cse11 (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse12))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_33|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_33| 1) 0) (not (= .cse11 0)) (not (= .cse12 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse12 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= .cse13 (mod (+ .cse11 (* .cse14 255)) 256))))))) .cse16 .cse9 .cse17) (and .cse1 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse20 (mod |c_ULTIMATE.start_main_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_33|))) (let ((.cse18 (mod .cse20 256))) (let ((.cse19 (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse18))) (and (= (mod (mod .cse18 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_33|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_33| 1) 0) (not (= .cse19 0)) (not (= .cse18 0)) (= .cse13 (mod (+ (* 255 .cse20) .cse19) 256))))))) .cse16) (and (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse22 (mod .cse4 |v_ULTIMATE.start_gcd_test_~a#1_33|))) (let ((.cse23 (+ (- 256) (mod (+ .cse22 |v_ULTIMATE.start_gcd_test_~a#1_33|) 256)))) (let ((.cse21 (mod .cse23 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_33|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_33| 1) 0) (= (mod (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse21) 256) .cse8) (not (= .cse21 0)) (= .cse13 (mod (+ .cse22 (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse23) |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse26 (mod .cse4 |v_ULTIMATE.start_gcd_test_~a#1_33|))) (let ((.cse25 (+ (- 256) (mod (+ .cse26 |v_ULTIMATE.start_gcd_test_~a#1_33|) 256)))) (let ((.cse24 (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse25))) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_33|)) (<= (+ |v_ULTIMATE.start_gcd_test_~a#1_33| 1) 0) (not (= .cse24 0)) (= (mod .cse25 |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= .cse13 (mod (+ .cse26 .cse24 |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))))))) .cse5)) .cse16 .cse9 .cse10) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_33| Int)) (let ((.cse27 (mod (mod .cse15 |v_ULTIMATE.start_gcd_test_~a#1_33|) 256))) (and (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_33| .cse27) 256)) (not (= .cse27 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod .cse27 |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (<= 0 |v_ULTIMATE.start_gcd_test_~a#1_33|) (<= |v_ULTIMATE.start_gcd_test_~a#1_33| 127)))) .cse2 .cse9 .cse17))))) is different from true